Merge changes from topic "multifile_blobcache_advanced_usage" into main

* changes:
  EGL Multifile Blobcache: Remove entries when valueSize is zero
  EGL Multifile Blobcache: Handle lost cache
  EGL Multifile Blobcache: Fix applyLRU
  EGL Multifile Blobcache: Clean up key reuse
  EGL: Add flag for bugfixes found via advanced blobcache usage