[graphite] Add caches for uniformdata and programs

Bug: skia:12466
Change-Id: Id61b019b583357bb9474c58a81270b0b860c9c4f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/464120
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
13 files changed