Reland "Replace GrQuadList with variable-length quad buffer"

This reverts commit 19628ec144a6e480e56bbfff38ae07a3db1588d1.

Reason for revert: fixed struct size on 32-bit iOS

Original change's description:
> Revert "Replace GrQuadList with variable-length quad buffer"
> 
> This reverts commit f2816044292f0d405c3060572d65fb35cef7cc3a.
> 
> Reason for revert: Breaking G3 and iOS Build
> 
> Original change's description:
> > Replace GrQuadList with variable-length quad buffer
> > 
> > Change-Id: I5cc391e8d143032893511695961f5251f40e8291
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/223803
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
> > Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> 
> TBR=bsalomon@google.com,michaelludwig@google.com
> 
> Change-Id: I55947c068c6472c301952e33cbc36d04505f9800
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/223993
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,michaelludwig@google.com

Change-Id: I7522270d467faf0f4e777831e9186bad010409ab
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/224184
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
9 files changed