Rename GrStrokeOp -> GrStrokeTessellateOp

Bug: skia:10419
Change-Id: I04fecec39610d7519edef8a97f367b329b6eea4c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/366116
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
6 files changed