Reland "Optimize GrTessellatePathOp's code to emit inner triangles"

This is a reland of 0f9ebd100e9127e61c7aa39d4b60079497644817

Original change's description:
> Optimize GrTessellatePathOp's code to emit inner triangles
>
> Previously we used a naive algorithm to generate "middle-out" topologies
> for inner polygons, including copying all endpoints to a new array.
>
> This CL adds a "GrMiddleOutPolygonTriangulator" class that
> accomplishes the same thing in 1/5th the time using a small O(log N)
> stack.
>
> Change-Id: I3a7059e5d133a730b7084a17d8fbaaa3aaa81336
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/285531
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>

TBR=ethannicholas@google.com

Change-Id: I8402e5455e14aef9c5e92ee21100fcd7ace222ff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/285740
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
6 files changed