Add Editorial integration tests through Hiero

[robin-ynput]

Is there an existing issue for this?

• I have searched the existing issues and added correct labels.

Please describe the feature you have in mind and explain what the current shortcomings are?

I would be great to bring Hiero implementation for testing Editorial workflow:

• Create shots, audio and review
• Editorial packages

Recent work on the publisher made it clear manual testing is not enough.
Nuke is already implemented so hopefully we can leverage part of it. Also Hiero seems to be the easiest DCC to script with compare to Resolve or Flame.

Suggested implementation?

Need to test those use cases:

• audio extract
• image sequence and media with embedded timecode
• vertical alignment features
• reviewable + clip resolution
• editorial packages

Describe alternatives you've considered:

No response