Move more Ops to skgpu::v1 namespace

GrClearOp
GrDashOp

Bug: skia:11837
Change-Id: Ib65418952e7d4fb1e419e4942223823f22302b34
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/443518
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
11 files changed