[nobuildbot] Migrate all Linux GCE bots

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4994

Change-Id: Ib63f36b3803117d5357c8e70c572653afd151abe
Reviewed-on: https://skia-review.googlesource.com/4994
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
tree: 8f00ef6c7f7ae58d7ffeb4d7876fafe7c8add6c8
  1. recipe_modules/
  2. recipes.py
  3. recipes/