php-in-php: Object_.php tranche 3 — destructor/static/instance property LLVM (#9938)

[PurHur]

Summary

• Extract ObjectDestructorLlvm (__object__invoke_destructor dispatch + magic __destruct calls)
• Extract ObjectStaticPropertyInitLlvm (typed static property global init emission)
• Extract ObjectInstancePropertyLlvm (ordinary instance property fetch + dynamic fetch box)
• Object_.php: 6208 → 5723 lines (−485, ~9% cumulative from ~6300 baseline)

Closes #9938 (partial — 30% shrink target still open for follow-up tranches)

php-src reference (semantics unchanged)

• Zend/zend_object_handlers.c — property read/write
• Zend/zend_enum.c — enum case singleton fetch

Verification

php vendor/bin/phpunit test/unit/ObjectPropertyRuntimeShrinkTest.php
# OK (8 tests, 27 assertions)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php test/repro/issue9938_enum_property.php   # bool(true)
php bin/vm.php test/repro/issue9938_enum_property.php  # bool(true)
php bin/jit.php test/repro/issue9938_enum_property.php # bool(true)
'

make bootstrap-selfhost-vm-driver-execute-probe
# bootstrap-selfhost-vm-driver-execute-probe: OK

Lines moved

Module	Role
ObjectDestructorLlvm.php	destructor LLVM
ObjectStaticPropertyInitLlvm.php	static property __init__ emission
ObjectInstancePropertyLlvm.php	instance property fetch/box LLVM

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