[runtime] Add missing release for call to mono_reflection_type_get_type.

[rolfbjarne]

No more leaks!

Before:

There were 205834 MonoObjects created, 205834 MonoObjects freed, so no leaked MonoObjects. (static registrar)
There were 258092 MonoObjects created, 258013 MonoObjects freed, so 79 were not freed. (dynamic registrar)

After:

✅ There were 205834 MonoObjects created, 205834 MonoObjects freed, so no leaked MonoObjects. (static registrar)
✅ There were 258100 MonoObjects created, 258100 MonoObjects freed, so no leaked MonoObjects. (dynamic registrar)

[vs-mobiletools-engineering-service2]

❌ [PR Build] Tests failed on Build ❌

Tests failed on Build.

• Azure DevOps
• Html Report (VSDrops)

API diff

✅ API Diff from stable

View API diff

• iOS vsdrops gist
• macOS vsdrops gist
• macCat vsdrops gist
• macCatiOS gist
• tvOS vsdrops gist
• watchOS vsdrops gist

API & Generator diff

✅ API Diff (from PR only) (no change)
✅ Generator Diff (no change)

GitHub pages

Results can be found in the following github pages (it might take some time to publish):

• Test results
• API diff
• API & Generator diff

Test results

2 tests failed, 106 tests passed.

Failed tests

• monotouch-test/Mac [dotnet]/Debug (CoreCLR) [dotnet]: Failed (Test run failed.
  Tests run: 2444 Passed: 2356 Inconclusive: 7 Failed: 2 Ignored: 86)
• framework-test/Mac Catalyst/Debug: TimedOut (Execution timed out after 1200 seconds.
  No test log file was produced)

Pipeline on Agent XAMBOT-1094.BigSur'
Merge 8c443c5 into 1e1e029

[rolfbjarne]

Test failures are unrelated

• monotouch-test/Mac [dotnet]/Debug (CoreCLR) [dotnet]: Fixed in [tests] Adjust MX8029_b and MX8033 tests to cope with slightly different exception message output for CoreCLR. #11732.
• framework-test/Mac Catalyst/Debug: https://github.com/xamarin/maccore/issues/2414