Fix get_debug_type() on enum cases passed directly to calls (#4260)

[PurHur]

Summary

• Fix compiler lowering when php-cfg folds enum case ClassConstFetch operands but later calls lack a preceding fetch in CFG order (backed + unit enums in one script).
• Emit runtime TYPE_CLASS_CONST_FETCH for enum case members instead of compile-time fold, and prefetch enum case call args via compileCallArgRuntimeEnumConstFetchOps + call ordinal mapping.
• Extend operandsReferToSameVariable() to match via Block::cfgVarRoot() for php-cfg temporaries.

get_debug_type() implementation in ext/standard/get_debug_type.php already handles TYPE_ENUM_CASE; this is a compile-time dataflow fix.

php-src reference: ext/standard/type.c — PHP_FUNCTION(get_debug_type)

Closes #4260

Test plan

php bin/vm.php test/repro-maintainer/get_debug_type_enum.php
# Color
# Size

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php vendor/bin/phpunit test/unit/GetDebugTypeBuiltinTest.php
php vendor/bin/phpunit test/compliance/JITTest.php --filter get_debug_type_enum
php vendor/bin/phpunit test/compliance/VMTest.php --filter get_debug_type_enum
'
# OK (3 + 1 + 3 tests)

AOT note: bin/compile.php still segfaults on get_debug_type() with enum operands (pre-existing on master; get_class() enum AOT works). No new AOT fixture added — tracked separately from this compiler lowering fix.

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