Validate clashing siblings: Fix support for runtime instances

[BigRoy]

Changelog Description

Ignore runtime instances for the validation

Additional info

Avoids this error:

Traceback (most recent call last):
  File "C:\Users\Maqina03\AppData\Local\Ynput\AYON\dependency_packages\ayon_2407291312_windows.zip\dependencies\pyblish\plugin.py", line 528, in __explicit_process
    runner(*args)
  File "C:\Users\Maqina03\AppData\Local\Ynput\AYON\addons\maya_0.2.13-cb.1\ayon_maya\plugins\publish\validate_clashing_sibling_names.py", line 71, in process
    if not self.is_strip_namespaces_enabled(instance):
  File "C:\Users\Maqina03\AppData\Local\Ynput\AYON\addons\maya_0.2.13-cb.1\ayon_maya\plugins\publish\validate_clashing_sibling_names.py", line 137, in is_strip_namespaces_enabled
    if _is_plugin_active(plugin_name):
  File "C:\Users\Maqina03\AppData\Local\Ynput\AYON\addons\maya_0.2.13-cb.1\ayon_maya\plugins\publish\validate_clashing_sibling_names.py", line 110, in _is_plugin_active
    publish_attributes = instance.data["publish_attributes"]
KeyError: 'publish_attributes'

For example when publishing usd with contribution workflow enabled.

Testing notes:

1. Validation should not crash on runtime instances, e.g. usd workflow contributions

[LiborBatek]

@BigRoy sry, could provide some testing steps as Im not much familiar with that runtime instance term aka how to set it up for testing purposes, thx

[moonyuet]

LGTM

[BigRoy]

sry, could provide some testing steps as Im not much familiar with that runtime instance term aka how to set it up for testing purposes, thx

Ah sorry,

@LiborBatek just publish a usd instance with asset contribution checkbox enabled on the instance (it's enabled by default)

[LiborBatek]

Did try on both model and animation into USD and seems fine without causing any issues...publishing well