Trim quotes when returning selector comments

[jhrozek]

Summary

Let's not return the description quoted to the user.

Related: #3723

Change Type

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

manual + there's a unit test

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 54.191%. remained the same
when pulling 87630ea on jhrozek:selector_db_trim_quotes
into 5ad938d on stacklok:main.