CMCL-1517: Fix ListView inspectors

[glabute]

[Delete any line or section that does not apply]

Purpose of this PR

ListView inspectors are broken on Unity 2022.3.9f1:

1. ClearShot child cameras have invalid warning icons in the inspector
2. SequencerCamera does not populate the camera drop-down in the instruction list
3. InputAxisController editor is missing foldout arrows on the Driven Axes items

Testing status

• Added an automated test
• Passed all automated tests
• Manually tested

Documentation status

[Overview of how documentation is affected by this change. If there is no effect on documentation, explain why. Otherwise, state which sections are changed and why.]

• Updated CHANGELOG
• Updated README (if applicable)
• Commented all public classes, properties, and methods
• Updated user documentation

Technical risk

low

[AntoineCharton]

Looks good to me.

There is this bug with buttons but it's on the UI Element side. Those changes are fine.

[codecov-commenter]

Codecov Report

Attention: 42 lines in your changes are missing coverage. Please review.

Comparison is base (cbbc72d) 21.05% compared to head (a58b210) 21.05%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #903      +/-   ##
==========================================
- Coverage   21.05%   21.05%   -0.01%     
==========================================
  Files         244      244              
  Lines       27445    27453       +8     
==========================================
  Hits         5779     5779              
- Misses      21666    21674       +8     

Files	Coverage Δ
...achine/Editor/Editors/InputAxisControllerEditor.cs	27.00% <0.00%> (+0.26%)	⬆️
...machine/Editor/Utility/CmCameraInspectorUtility.cs	0.00% <0.00%> (ø)
...Editor/Editors/CinemachineBlenderSettingsEditor.cs	0.00% <0.00%> (ø)
...Editor/Editors/CinemachineSequencerCameraEditor.cs	0.00% <0.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.