Fix unlink/rename php:// wrapper warning text (#18404)

[PurHur]

Summary

• Add VmFsPhpWrapper SSOT for php:// stream wrapper unlink/rename rejection messages (php-src main/streams/userspace.c).
• Short-circuit VmFsUnlinkPure / VmFsPathPure::rename for php:// URIs before host @unlink/@rename so ENOENT paths are not used.
• Wire VM (VmFilestatFailure) and JIT (UnlinkJitHelper, RenameJitHelper) to emit Zend-equivalent warnings.

Closes #18404

php-src reference

• main/streams/userspace.c — wrapper unlink/rename handlers
• ext/standard/filestat.c — php_unlink / php_rename

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php test/repro/maintainer_gap_unlink_rename_php_wrapper_warning.php
php bin/vm.php test/repro/maintainer_gap_unlink_rename_php_wrapper_warning.php
vendor/bin/phpunit test/compliance/VMTest.php --filter "stdlib/unlink_rename_php_wrapper_warning"
php script/check-selfhost-spine-coverage-sync.php'

Output (VM matches Zend):

unlink=false
rename=false
warnings=unlink(): PHP does not allow unlinking|rename(): PHP wrapper does not support renaming
...
OK (1 test, 1 assertion)
check-selfhost-spine-coverage-sync: OK (spine covers all 4703 inventory files)

Made with Cursor