Move 6p arm64 CPU tests to Pixel C

We have much more capacity on the Pixel Cs.

BUG=skia:

Change-Id: I65e136d5e2f44ec4bef9c168a86e706537878532
Reviewed-on: https://skia-review.googlesource.com/5755
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
tree: e8604bbe4f17137f2d314043625d90e42c5d7323
  1. recipe_modules/
  2. recipes.py
  3. recipes/