Backport PR BatchRendererGroup test project splitMask support (#6416)

[JussiKnuuttila]

• Ported BatchRendererGroup API tests to use the refactored culling callback API.

• BRGSetup.cs: added 64 bytes of zeros to beginning (convention). Causes it to render black objects.

• BRGSetup.cs test case didn't setup inverse matrices correctly, causing tests to fail randomly.

• Updated BRG test scripts for HDRP

• Automated formatting patch to make Yamato pass

• Update yamato generated refenrece images

• Update yamato generated refenrece images for BRG_URP

• Properly initialize drawCommandPickingInstanceIDs to null in the simple example.

Co-authored-by: Sebastian Aaltonen sebastian.aaltonen@unity3d.com
Co-authored-by: Tomas Kiniulis tomas.kiniulis@unity3d.com
Co-authored-by: MingWai Chan mingwai@unity3d.com

Please read the Contributing guide before making a PR.

• Read the Graphics repository & Yamato FAQ.

Checklist for PR maker

• Have you added a backport label (if needed)? For example, the need-backport-* label. After you backport the PR, the label changes to backported-*.
• Have you updated the changelog? Each package has a CHANGELOG.md file.
• Have you updated or added the documentation for your PR? When you add a new feature, change a property name, or change the behavior of a feature, it's best practice to include related documentation changes in the same PR. If you do add documentation, make sure to add the relevant Graphics Docs team member as a reviewer of the PR. If you are not sure which person to add, see the Docs team contacts sheet.
• Have you added a graphic test for your PR (if needed)? When you add a new feature, or discover a bug that tests don't cover, please add a graphic test.

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