Add interface collection codecs

[ReubenBond]

Fixes #8934

Problem

Issue #8934 reports failures when interface-typed collection fields are assigned runtime collection implementations which Orleans does not have concrete codecs for, such as collection-expression generated types. Those fields currently fall through to runtime-type serialization and can fail with CodecNotFoundException.

Solution

This adds regular open-generic codecs and copiers for common generic collection interfaces, including enumerable/list-like, set-like, and dictionary-like interfaces. The codecs preserve existing concrete runtime serialization when a concrete codec exists, and otherwise fall back to concrete BCL collection shapes (List<T>, HashSet<T>, and Dictionary<TKey, TValue>). The fallback writes bounded capacity hints, capped at 16K elements, so deserialization can preallocate efficiently without trusting accidentally huge reported counts.

The accompanying tests cover the issue regression, copy behavior, frozen collections, capacity-hint capping, and preservation of known concrete runtime behavior.

Notes

Non-generic collection interfaces and lookup/query/streaming interfaces remain out of scope for this change.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull request overview

This PR addresses Orleans serializer failures when collection-typed fields are declared as common collection interfaces (eg, IReadOnlyList<T>, ISet<T>, IDictionary<TKey,TValue>) but are assigned runtime collection implementations which do not have concrete codecs (such as compiler-generated collection-expression types). It adds open-generic interface codecs/copiers with safe fallback shapes, and updates the serialization test infrastructure to reduce per-test DI container churn while ensuring pooled state is released on disposal.

Changes:

• Added interface collection codecs/copiers for enumerable/list-like, set-like, and dictionary-like generic interfaces, including a resolver to handle codec-surrogate runtime types.
• Updated serializer/copy-context pools to be disposable and to release thread-local pooled state on ServiceProvider disposal.
• Added/updated unit tests and snapshot verifications, plus introduced a shared SerializationTester/fixture for TestKit-based tests.

Show a summary per file

File	Description
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.SetInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying set-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.ReadOnlySetInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying read-only set-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.ReadOnlyListInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying read-only list-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.ReadOnlyDictionaryInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying read-only dictionary-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.ReadOnlyCollectionInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying read-only collection-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.ListInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying list-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.EnumerableInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying enumerable-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.DictionaryInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying dictionary-interface fallback wire format.
test/Orleans.Serialization.UnitTests/snapshots/InterfaceCollectionRegressionTests.CollectionInterfaceFallback_Formatted_MatchesSnapshot.verified.txt	Adds snapshot verifying collection-interface fallback wire format.
test/Orleans.Serialization.UnitTests/SerializerServiceProviderLifetimeTests.cs	Adds tests ensuring pooled serializer state can be GC’d after DI container disposal and that returning pooled state post-disposal is safe.
test/Orleans.Serialization.UnitTests/ProtobufSerializerTests.cs	Updates tests to use shared SerializationTesterFixture.
test/Orleans.Serialization.UnitTests/NewtonsoftJsonCodecTests.cs	Updates tests to use shared SerializationTesterFixture.
test/Orleans.Serialization.UnitTests/MessagePackSerializerTests.cs	Updates tests to use shared SerializationTesterFixture.
test/Orleans.Serialization.UnitTests/MemoryPackSerializerTests.cs	Updates tests to use shared SerializationTesterFixture.
test/Orleans.Serialization.UnitTests/InterfaceCollectionCodecTests.cs	Adds comprehensive codec/copier tests + regression tests for interface-typed collections (including snapshots).
test/Orleans.Serialization.UnitTests/ConverterTests.cs	Updates converter tests to use shared SerializationTesterFixture.
test/Orleans.Serialization.UnitTests/BuiltInCodecTests.cs	Updates built-in codec tests to use shared SerializationTesterFixture.
src/Orleans.Serialization/Session/SerializerSessionPool.cs	Switches to a thread-local concurrent pool and makes the pool disposable to release thread-local state.
src/Orleans.Serialization/Invocation/Pools/ConcurrentObjectPool.cs	Adds IDisposable and disposal logic to clear thread-local stacks, plus disposed-state guarding.
src/Orleans.Serialization/Hosting/ServiceCollectionExtensions.cs	Registers InterfaceCollectionCodecResolver as a generalized codec.
src/Orleans.Serialization/Codecs/InterfaceCollectionCodecs.cs	Introduces interface collection codecs/copiers and the codec-type resolver for fallback/surrogate handling.
src/Orleans.Serialization/Cloning/IDeepCopier.cs	Makes CopyContextPool disposable so DI disposal can release pooled state.
src/Orleans.Serialization.TestKit/ValueTypeFieldCodecTester.cs	Adds ctor overload supporting the new shared fixture-based tester pattern.
src/Orleans.Serialization.TestKit/SerializationTester.cs	Adds shared tester base + fixture for reusing a service provider per test class.
src/Orleans.Serialization.TestKit/FieldCodecTester.cs	Refactors to inherit from SerializationTester, enabling fixture reuse and centralizing service provider lifetime.
src/Orleans.Serialization.TestKit/CopierTester.cs	Refactors to inherit from SerializationTester, enabling fixture reuse and centralizing service provider lifetime.
src/api/Orleans.Serialization/Orleans.Serialization.cs	Updates public API surface for CopyContextPool/SerializerSessionPool to implement IDisposable.
src/api/Orleans.Serialization.TestKit/Orleans.Serialization.TestKit.cs	Updates public API surface for new SerializationTester/fixture and updated tester base types/constructors.

Copilot's findings

• Files reviewed: 27/28 changed files
• Comments generated: 2

[cptjazz]

Also closes #9032 and #8964