Revert "[graphite] Simplify vertex processing for PerEdgeAAQuadRenderStep."

This reverts commit 89250a0bd6bb669631b5782fddc077ffa51a6bca.

Reason for revert: Chrome failures.

Original change's description:
> [graphite] Simplify vertex processing for PerEdgeAAQuadRenderStep.
>
> Removes all shader and set-up code associated with stroking and
> rounded rectangles, while retaining edge AA information.
>
> Bug: b/307950537
> Change-Id: I846935617bd705a44c91f573bd3af605b5deab89
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/771476
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>

Bug: b/307950537
Change-Id: I659af74a26251b8aa4f4d505ce6a161efd06c282
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/772257
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
5 files changed