Add spy all flag

[bitPogo]

What does the PR achieve/Which part improves the PR?

This adds a new flag (spyAll) to make it possible to generate for all interfaces spies.

:thinking: DOD Checklist

• [x] My code passes the lint checks.
• [x] My changes are covered with proper tests.
• [x] All tests are pass.
• [x] My changes update the documentation.
• [x] My changes are reflected in the changelog.