Improve Publish Error Report when 'maya-unknown-nodes-save-error' happens due to unloaded addon like Arnold render

[LiborBatek]

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?

When trying to publish e.g. model and the workfile having .mb format and having some unknown nodes present (e.g. when accidentally unloaded mtoa plugin) and AYON trying to force prefered .ma as representation for workfile publish will fail and with not much clear message whats going on.

when inspected in the detail pane:

Traceback (most recent call last):
  File "C:\Users\lbate\AppData\Local\Ynput\AYON\dependency_packages\ayon_2406251801_windows.zip\dependencies\pyblish\plugin.py", line 528, in __explicit_process
    runner(*args)
  File "C:\Users\lbate\AppData\Local\Ynput\AYON\addons\maya_0.4.3\ayon_maya\plugins\publish\extract_model.py", line 91, in process
    cmds.file(path,
RuntimeError: This file contains unknown data which is preventing Maya from changing the file format.
Check if unsupported plug-ins are used in the scene. Remove the unsupported data and resave.
See this article for more detail.
https://www.autodesk.com/maya-unknown-nodes-save-error

Suggested implementation?

It should user inform in a clear way whats the possible cause of the issue and propose a solution to it.

e.g.

It happens you may miss some maya addons loaded so AYON cant change workfile file format due to the unknown nodes present in your scene.

Please resolve unknown nodes via loading apropriate maya plugin or remove such nodes first so saving action can be performed.

You get the idea.

Maybe its worth to think about possible logic to not change file format if changing could not be performed due to these circumstances. (not sure about it tho)

Describe alternatives you've considered:

No response