Maya: Validate Camera Contents Pyblish Select Invalid

[m-u-r-p-h-y]

Describe the bug

Select Invalid in failed validator is broken.

To Reproduce
Steps to reproduce the behavior:

1. Create a camera instance with the wrong data selected (group, geometry, etc.)
2. Publish
3. Run validators
4. Select Invalid in failed camera validator

Screenshots

// pyblish.pyblish.plugin.Action : Finding invalid nodes.. // 
// Warning: pyblish.ValidateCameraContents : Camera instance must have a single camera. Found 0: [] // 
// Error: pyblish.plugin : Traceback (most recent call last):
  File "D:\REPO\OpenPype\.venv\lib\site-packages\pyblish\plugin.py", line 522, in __explicit_process
    runner(*args)
  File "D:\REPO\OpenPype\openpype\hosts\maya\api\action.py", line 111, in process
    invalid_nodes = plugin.get_invalid(instance)
  File "D:\REPO\OpenPype\openpype\hosts\maya\plugins\publish\validate_camera_contents.py", line 43, in get_invalid
RuntimeError: No cameras in instance.
Traceback (most recent call last):
  File "D:\REPO\OpenPype\.venv\lib\site-packages\pyblish\plugin.py", line 522, in __explicit_process
    runner(*args)
  File "D:\REPO\OpenPype\openpype\hosts\maya\api\action.py", line 111, in process
    invalid_nodes = plugin.get_invalid(instance)
  File "<string>", line 43, in get_invalid
RuntimeError: No cameras in instance. // 

[cuID:]