[CP] DDC Test and builder configuration changes

[nshahan]

Commit(s) to merge

fc2c926

Target

beta and stable

Prepared changelist for beta/stable

• Stable
  https://dart-review.googlesource.com/c/sdk/+/284542
  https://dart-review.googlesource.com/c/sdk/+/284543
  https://dart-review.googlesource.com/c/sdk/+/284544

Issue Description

We updated the configurations for running test builders in the SDK repo. There are accompanying changes in the infrastructure but that config is outside of the SDK repo and is the same across main, beta, and stable branches.

What is the fix

Changes to the DDC test and builder configurations that work with the infrastructure changes.

Why cherry-pick

This cherry pick is only needed if there are other cherry picks selected before the next merge from main into beta or stable. It will help ensure we can still run trybots for DDC.

Risk

low

Issue link(s)

#51481

Extra Info

I'm filing this issue early in preparation. @athomas can link the change to the infrastructure that will trigger the need for this cherry pick when it is ready.

Beta requires cherry picking 2 changes:
https://dart-review.googlesource.com/c/sdk/+/284545 (non-breaking)
https://dart-review.googlesource.com/c/sdk/+/284546 (breaking and requires previous change + change in infra repo)

Stable requires cherry picking 3 changes:
https://dart-review.googlesource.com/c/sdk/+/284542 (non-breaking)
https://dart-review.googlesource.com/c/sdk/+/284543 (non-breaking)
https://dart-review.googlesource.com/c/sdk/+/284544 (breaking and requires previous two changes + change in infra repo)

[itsjustkevin]

@sigmundch can you take a look at this cherry pick request?

[athomas]

LGTM, I strongly suggest we merge this to avoid losing DDC test coverage on stable until 3.0.

[sigmundch]

Fully agree with @athomas! LGTM 👍