AOT: ZipArchive addFile/replaceFile keep file bytes after close/reopen (#35449/#35496)

[PurHur]

Summary

• ZipArchive::addFile() and replaceFile() passed file_get_contents payloads through ZipArchiveJitHelper::exec() $s2 string formals; under thin AOT that aliasing dropped bytes, producing empty zip entries after close()/open() (peer Fix ZipArchive addFromString AOT entry names (#35454) #35710 / AOT: ZipArchive::addFromString second call overwrites first entry — archive loses prior files (ext/zip/php_zip.c) #35454 addEntry).
• Route both through dedicated NestedJIT helpers: addEntry() (addFile) and new replaceEntry() (replaceFile); register replaceEntry in ZipArchiveEmbedBridge.
• Add ZipArchiveAddFile35449AotTest; refresh replaceFile dispatch assertion.

php-src: ext/zip/php_zip.c — zim_ZipArchive_addFile, zim_ZipArchive_replaceFile

Test plan

./script/aot-smoke.sh
# aot-smoke: 8 passed, 0 failed

./script/phpunit.sh --filter 'ZipArchiveAddFile35449AotTest|ZipArchiveReplaceFile35496AotTest'
# OK (4 tests, 18 assertions)

export PHP_COMPILER_ENABLE_ZIP=1
./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/ziparchive_addfile_status_aot.php'
./script/docker-exec.sh -- bash -lc 'php bin/compile.php -o /tmp/z.bin test/repro/ziparchive_addfile_status_aot.php && /tmp/z.bin'
# VM and AOT both print from-file after reopen

Reopens #35449, #35496

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