Rewrite of the ImageInfoCache infrastructure with fixed crashes and better granularity

- apply save atomic operations and drop ImageInfoDatas from the cache if ref count is 0
- remove dependency on the big database lock, use a finer grained readwritelock for ImageInfo
- cache image infos by name as well, used for thumbnail info retrieval
- rewrite the getter methods in ImageInfo for the ReadWriteLock

BUG: 262077