Fix LocalSnapshotStore Metadata Fetch to ensure persistenceid match.

[to11mtm]

Fixes #7009

Changes

Adds an additional filter check to getting snapshot metadata to ensure persistenceId matches.

Checklist

For significant changes, please ensure that the following have been completed (delete if not relevant):

• This change follows the Akka.NET API Compatibility Guidelines.
• This change follows the Akka.NET Wire Compatibility Guidelines.
• I have reviewed my own pull request.
• Design discussion issue #
• Changes in public API reviewed, if any.

No benchmarks:

LocalSnapshot store is not meant to be performant. That said, I think one can agree that the additional .Where() call is dwarfed by existing regex and IO in this operation. If we want this to be 'faster' we should consider instead unrolling the LINQ block into something less capture-y.

[Aaronontheweb]

Test failures were unrelated Akka.Persistence.TestKit.Tests, which are being addressed at #7037