HIVE-26376: HMS leaks filesystem objects (memory) when using StorageBasedAuthorizationProvider

[zabetak]

What changes were proposed in this pull request?

Close filesystem references in StorageBasedAuthorizationProvider after use.

Why are the changes needed?

To prevent leaving filesystem objects and hitting OOM error see HIVE-26376 for more details.

Does this PR introduce any user-facing change?

No

How was this patch tested?

Manual tests.