[Feature Request]: Add rule when using .concurrent and snapshots

[Haberkamp]

To run snapshot tests in parallel you must use the local Test Context. See: https://vitest.dev/api/#test-concurrent

Vitest already warns us about that once we write execute the test. (Error: Snapshot cannot be used outside of test). The error message does not tell the developer how to fix the issue. Adding a new lining rule will improve the developer experience for that scenario.

I'd be willing to contribute a PR for this issue.

[veritem]

a pr is welcome!