chore: enable idempotency checks on try-runtime for upgrade-test

[kylezs]

Pull Request

Checklist

Please conduct a thorough self-review before opening the PR.

• I am confident that the code works.
• I have written sufficient tests.
• I have written and tested required migrations.
• I have updated documentation where appropriate.

Summary

We should check for idempotency to be safe against accidentally leaving migrations in, which could result in a migration being run twice, which could corrupt state.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72%. Comparing base (9842dea) to head (7d067fb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff           @@
##            main   #5391    +/-   ##
======================================
- Coverage     72%     72%    -0%     
======================================
  Files        486     486            
  Lines      85863   85727   -136     
  Branches   85863   85727   -136     
======================================
- Hits       61515   61316   -199     
- Misses     21533   21586    +53     
- Partials    2815    2825    +10     

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