Workfile Template Builder: Allow Create Placeholder to define the 'active' state

[BigRoy]

Changelog Description

Workfile Template Builder: Allow Create Placeholder to define the 'active' state of the created instance.

Additional info

Example in Houdini using ynput/ayon-houdini#36

The template:

After template build:

Testing notes:

would be nice to test in Nuke and Maya if it does not break anything.
Use old template where are placeholders without active.
Use new template and try if it creates activated/deactivated instances based on the placeholder data.

1. Test whether this works when creating create placeholders in other hosts, like:
   • Nuke
   • Houdini (requires Support Houdini workfile templates ayon-houdini#36
     and bugfix Creators: Remove legacy pop of the 'active' data on create of instance. ayon-houdini#41 )
   • Maya (does not have "Create" placeholders - but may be good to test whether it still works)
   • (not sure which other hosts support Create Placeholders?)
2. Existing create placeholders in an existing template should still work and default to active.

[iLLiCiTiT]

Code looks good, would be nice to test in Nuke and Maya if it does not break anything.

• Use old template where are placeholders without active.
• Use new template and try if it creates activated/deactivated instances based on the placeholder data.

[BigRoy]

Code looks good, would be nice to test in Nuke and Maya if it does not break anything.

* Use old template where are placeholders without `active`.

* Use new template and try if it creates activated/deactivated instances based on the placeholder data.

Note: Maya does not have support for "Create" placeholders. Nonetheless, I added these testing notes to the PR description. 👍

[MustafaJafar]

It works in Houdini.