Make ziti agent snapshot-db match ziti fabric db snapshot. Fixes #2333

[plorenz]

No description provided.

[qrkourier]

I confirmed the old CLI signature without the path still works and helpfully returns the full path to the auto-generated filename. When specifying the optional output file path, only the specified path is returned (not a problem, just an inconsistency).

[plorenz]

I confirmed the old CLI signature without the path still works and helpfully returns the full path to the auto-generated filename. When specifying the optional output file path, only the specified path is returned (not a problem, just an inconsistency).

The default path is based on what's specified in the config file for the db. The snapshot code itself doesn't do anything with absolute paths, though maybe it should. I'll save that for a follow-up.