chore: change the get_filesystem context argument from Context to Context[Any]

[tonyandrewmeyer]

Neither of the get_filesystem methods make any use of the generic type of Context, but we need to provide a type to avoid having calls need a type: ignore, so Any seems the appropriate type.

Maybe #2242 should be done instead? But I think that can be done later, replacing this if needed.

[Copilot]

Pull request overview

This PR updates the type annotations for the get_filesystem methods in two classes (Container and Storage) to use Context[Any] instead of the bare Context type. Since these methods only use generic Context methods that don't depend on the specific charm type parameter, using Any as the type parameter is appropriate and avoids requiring type: ignore comments at call sites.

Key changes:

• Updated type annotation for Container.get_filesystem() parameter from Context to Context[Any]
• Updated type annotation for Storage.get_filesystem() parameter from Context to Context[Any]
• Removed the entire testing/tests/test_plugin.py test file (unrelated to type annotations)

Reviewed changes

Copilot reviewed 1 out of 1 changed files in this pull request and generated no comments.

File	Description
testing/tests/test_plugin.py	Entire test file deleted (appears unrelated to the PR's stated purpose)
testing/src/scenario/state.py	Updated get_filesystem method type annotations from Context to Context[Any] in both Container and Storage classes

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[james-garner-canonical]

Seems like a good fix to me. In addition to the covariance issue, another thing that might improve the typing UX of Context would be adding a default to the generic as well. I'll add a note to the issue.

[dimaqq]

I'm not the expert here.
Approving on the assumption that this doesn't appear to be breaking the state transition tests in the third-party charms that we track.