php-in-php: drop leftover Type always-on openssl_pbkdf2 ABI shell (#32870)

[PurHur]

Summary

• Remove always-on __compiler_openssl_pbkdf2 shell from Builtin\Type (peer php-in-php: drop leftover Type always-on openssl_sign/verify ABI shells (ext/openssl/openssl.c) #32866 / php-in-php: drop leftover Type always-on openssl_encrypt/decrypt ABI shells (ext/openssl/openssl.c) #32859; trust class Release v1.1.0: fix cold-build-check compile_failed on hello world (LLVM Module.php line 180; re-#24302) #32122).
• OpensslPbkdf2Runtime declares the ABI module-locally (getNamedFunction first + declareAbi when absent); user-script openssl_pbkdf2() still ensureLinkeds from ext/openssl/openssl_pbkdf2.php (no always-on HMAC kernel in every module).
• php-src: ext/openssl/openssl.c — PHP_FUNCTION(openssl_pbkdf2).

Closes #32870

Test plan

• ./script/phpunit.sh --filter 'TypeDeadOpensslPbkdf2AbiRuntimeShrinkTest|TypeDeadOpensslMethodsAbiRuntimeShrinkTest|OpensslPbkdf2AotTest|OpensslPbkdf2JitTest' → OK (12 tests, 62 assertions)
• ./script/docker-exec.sh -- bash -lc './script/aot-smoke.sh' → 8/8
• AOT repro: php bin/compile.php -o /tmp/pbkdf2_aot test/repro/issue_openssl_pbkdf2_aot.php && /tmp/pbkdf2_aot → v1ok / v2ok / v3ok + Zend-matching TypeError path

Made with Cursor

[PurHur]

Duplicate of already-merged #32873 (Closes #32869). Same openssl_pbkdf2 Type-shell shrink landed on master while this PR was open.