Convert GrPathIndirectTessellator to use GrVertexWriter

Bug: skia:10419
Change-Id: I061c216e6f49399e533fb9a83ba5d9f9d3af83e3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/408858
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
7 files changed