Move ActionOpt types into a subpackage of profiles

[dmjb]

This change does not provide much value right now, but this will simplify the diff of an upcoming PR. Some other trivial refactoring changes from that upcoming PR have been picked here to further reduce the size of that diff.

Summary

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Fixes #(related issue)

Change Type

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• 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)

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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: 53.689% (+0.002%) from 53.687%
when pulling 159e93f on rule-instance-refactor-prep
into 5acba37 on main.

[jhrozek]

surprised that linter doesn't complain about unsorted imports

[jhrozek]

it might be nice to sort the imports (I don't know why linter doesn't complain about that, it usually tells me to fix that), but otherwise LGTM.