Move GrTextureOp to skgpu::v1 namespace

Bug: skia:11837
Change-Id: Ie99b1c512885404351d6917bbea751d99a2ca23e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/442797
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
9 files changed