viz: test: Allow multiple quads to share SQS in CompositorFrameBuilder

This CL adds functionality to CompositorFrameBuilder to construct render
passes with multiple quads sharing a SharedQuadState.

This is done by:
- extract out the functionality that adds quads and owns the render pass
  to a base type
- make RenderPassBuilder inherit from this base type
- add QuadListBuilder, similar to RenderPassBuilder, but just allows
  adding quads
- add RenderPassBuilder::WithSharedQuadState(QuadListBuilder), which
  copies the quads from the list and overrides their SQS.

Change-Id: I9489f6ebf8577f16e94aae8c3a69b1bfd6accdf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6544647
Reviewed-by: Kyle Charbonneau <kylechar@chromium.org>
Commit-Queue: Michael Tang <tangm@microsoft.com>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1467665}