[3006.x] Constrain the localfs cache to the cachedir #67033
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What does this PR do?
Constrain the localfs cache module to its cachedir.
What issues does this PR fix or reference?
Fixes: #67031
Previous Behavior
Operates on the whole filesystem when
bank
(orkey
) is prefixed withos.sep
New Behavior
Only operates on subpaths of
cachedir
.Merge requirements satisfied?
[NOTICE] Bug fixes or features added to Salt require tests.
Commits signed with GPG?
Yes