.ci.yaml will exist in various Flutter repos and be dependent on flutter/cocoon. To ensure changes to this config or the scheduler are compatible, we need to bring up a builder to validate the changes.

A change to cocoon requires validating all supported repos whereas a change to a supported repo only requires validating that config.

• add recipe support https://flutter-review.googlesource.com/c/recipes/+/12021
• add prod builder https://github.com/flutter/infra/pull/406
• add try builder https://github.com/flutter/infra/pull/407
• add entries to try/prod builders json config add new try/prod builders for validate_ci_config #79913
• add test to cocoon repo Test all repo configs cocoon#1149