JIT: ldap_compare() via LdapResultJitHelper bridge (#32121)

[PurHur]

Summary

• Add LdapResultJitHelper::compareArgv + JitLdapResult::invokeCompare so compiled ldap_compare() delegates to existing VmLdapCore::compare() semantics (php-src ext/ldap/ldap.c).
• Register __compiler_ldap_compare bridge in LdapRuntime.php via JitVmHelperLink::ensureBridge — no new runtime/*.c logic.
• Replace the JIT LogicException stub in ldap_compare::call().

C runtime shrink

No C added. Behavior lives entirely in ext/ldap/ + lib/JIT/Builtin/LdapRuntime.php.

Test plan

./script/phpunit.sh --filter 'LdapCompareJitHelperTest|LdapRuntimeShrinkTest'
# OK (4 tests, 37 assertions)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && export PHP_COMPILER_ENABLE_LDAP=1 && php bin/jit.php test/repro/issue_ldap_compare_jit.php 2>&1 | grep -v Deprecated'
# fn=1
# result=-1
# ok

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && export PHP_COMPILER_ENABLE_LDAP=1 PHP_COMPILER_PROFILE=8.4 && php bin/jit.php test/compliance/cases/ext/ldap_compare_parse.phpt 2>&1 | tail -12'
# ldap_compare=1 … compare_error_int … (matches --EXPECT)

Not run: full compliance shard, bootstrap-selfhost-link, differential-sweep (no lowering/CFG change beyond ldap_compare bridge).

Closes #32121

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