De-GL-ify tests, gm and tools

Change-Id: Id15a3a4b2c8b80b9dc7ecdab1cf1af1f9282f442
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/215447
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
18 files changed