Drone recipe for sdk tasks.

Sharded SDK tasks will be running shards as sub builds. This recipe is
able to run a task with a combination of shard + subshard.

Change-Id: Ifadf9930df562d65da401c6feeaf7e77733fcccd
Bug: https://github.com/flutter/flutter/issues/62811
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/5163
Reviewed-by: Christopher Fujino <fujino@google.com>
Reviewed-by: Tong Wu <wutong@google.com>
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
3 files changed
tree: f04cb4dd2b29b9f8056536917b3c2539fb7c5445
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. .style.yapf
  6. OWNERS
  7. recipes.py