Allow setting log level for mindev ruletype test

[jhrozek]

Summary

I was debugging a ruletype change and found it handy to have the engine
debug logs dumped onto the console.

This patch adds a new parameter --log-level that defaults to error
and lets you set the log level for the evaluation of the engine.

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

AUTH_TOKEN=topsecret REGO_ENABLE_PRINT=true go run cmd/dev/main.go ruletype test --profile /Users/jakub/devel/playground/codeql-python.yaml --rule-type /Users/jakub/devel/minder-rules-and-profiles/rule-types/github/codeql_enabled.yaml --entity /Users/jakub/devel/playground/repository.yaml --log-level=debug

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: 48.193% (+0.01%) from 48.181%
when pulling 1aab9fc on jhrozek:mindev_logger
into c77ed44 on stacklok:main.