General: Comment per instance in Publisher

[iLLiCiTiT]

Brief description

Instances in publisher can have ability to set comment per instance.

Description

Collect comment plugin also store comment to each instance in context (so all plugins using it can access it directly). Added plugin which define "comment" attribute per instance and have settings for which families is available. By default is disabled and for none families.

The same should work when instance is sent to farm. Comment should stay on instances (didn't test).

Additional information

Modified instance data sent to farm to contain comment per instance to persist comment from UI.

Testing notes:

1. Enable the Collect Comment per instance in settings and fill families by your choice (project_settings/global/publish/collect_comment_per_instance)
2. Run host which use new Publisher tool (e.g. TrayPublisher)
3. Create instance with family from settings
4. Select instance and fill it's comment
5. Publish
6. Validate that the comment on instance was used where should be (e.g. in ftrack -> make sure comment can be used in note/description)

[ynbot]

Task linked: OP-4531 comment per item in tray publisher