[Impeller] Use direct tessellation geometry for simple clip shapes

[flar]

This work leverages the recent work to directly tessellate the simple primitives for rendering and uses their geometry classes for equivalent clip primitives.

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Changes reported for pull request #48959 at sha f4d020b

[flar]

There are 2 new goldens, but a couple of the old tests have "off by 1" pixels on the edges of the RRect clips that I've left for reviewers to see.

Perf data, using my primitive basher. Note that I didn't think this would show much improvement at all since I have to do:

  Save()
  ClipFoo(...)
  DrawRect(bounds, paint)
  Restore()

for each operation, but on my M1 MBPro:

[flar]

I was going to provide numbers for my Pixel 6a, but the text on the Performance Overlay seems to have disappeared.

[jonahwilliams]

LGTM!

[jonahwilliams]

Suggested change

	ClipGeometry(geometry, clip_op);
	ClipGeometry(std::move(geometry), clip_op);

[flar]

Skipping to avoid having to modify more method signatures to go along with this change...