File stores locations do not respect the Global State persistent location

The file stores (Single, SoftIndex, RocksDB) should create files relative to the GlobalState persistent location unless specified.
Additionally each of the file stores differs in the filesystem layout:

• The SoftIndex store does not use the name of the cache in the file path, preventing sharing of directories between multiple caches.
• The RocksDB store allows configuring data and expired locations to point to the same directory, which will result in data corruption