[QUAD] Maya ABC Camera extraction: Fix relationship bug

[BenSouchet]

Changelog Description

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Additional info

Previous crashlog:

Traceback (most recent call last):
  File "/users_roaming/chector/Documents/src/OpenPype/.venv/lib/python3.9/site-packages/pyblish/plugin.py", line 522, in __explicit_process
    runner(*args)
  File "/users_roaming/chector/Documents/src/OpenPype/openpype/hosts/maya/plugins/publish/extract_camera_alembic.py", line 104, in process
  File "/users_roaming/chector/Documents/src/OpenPype/openpype/hosts/maya/plugins/publish/extract_camera_alembic.py", line 2, in AbcExport
RuntimeError: |root and |root|grp_cam|camera_camerarigMain_01:asset|camera_camerarigMain_01:root|camera_camerarigMain_01:grp_camera|camera_camerarigMain_01:camera have parenting relationships
|root and |root|grp_cam|camera_camerarigMain_01:asset|camera_camerarigMain_01:root|camera_camerarigMain_01:grp_camera|camera_camerarigMain_01:camera have an ancestor relationship.

Testing notes:

1. start with this step
2. follow this step