[stable30] fix: clear opcache after app extraction

[MichaIng]

• Resolves: [Bug]: Internal server error after update to 31.0.5 #52977

Summary

Manual backport of: #53210

clear opcache post app update extraction to prevent outdated files issues.

opcache.validate_timestamps=0 disables automated file modification checks.

TODO

• ...

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

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