Fix race conditions in ArchiveFileSystem

[seer-by-sentry]

Fixes CLIENT-3AB. The issue was that: Unprotected concurrent multimap access during file existence checks and texture reprioritization causes hash table corruption and access violation.

• Added a FastCriticalSectionClass mutex (m_archiveDirectoryMutex) to ArchiveFileSystem to protect its internal directory structure and nested elements.
• Implemented mutex locking in loadIntoDirectoryTree, doesFileExist, friend_getArchivedDirectoryInfo, and getArchiveFile to ensure thread-safe access to the archive directory.
• Addressed potential race conditions during concurrent file existence checks and texture reprioritization operations.

This fix was generated by Seer in Sentry, triggered automatically. 👁️ Run ID: 9526657

Not quite right? Click here to continue debugging with Seer.