Change architecture #defines to be SK_GPU_V1 and SK_GPU_V2

A strictly mechanical CL

Bug: skia:11837
Change-Id: Id794d1fefe261d685b19e5d4d599cdab5e021cf7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/424038
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
18 files changed