Add composite actions to run the experiments

[jprinet]

Relates to https://github.com/gradle/ge/issues/13584

[jthurne]

These are super-cool!

[runningcode]

Thanks Jerome. This looks good overall but two things:

I think we want these to exist in this repository: https://github.com/gradle/gradle-enterprise-build-optimization-experiments

The other requirement (from the ticket) is that we want each project to be its own Github workflow. This will allow better re-use of these from different teams so they can copy them to their use case.
That being said, this might also be suitable. I will let @etiennestuder decide.

[jprinet]

I think we want these to exist in this repository: https://github.com/gradle/gradle-enterprise-build-optimization-experiments

My impression is that the repo providing the scripts should be the one providing the composite actions to use them. This would reduce the risk of desynchronization.

The other requirement (from the ticket) is that we want each project to be its own Github workflow. This will allow better re-use of these from different teams so they can copy them to their use case. That being said, this might also be suitable. I will let @etiennestuder decide.

So far, there is no need to separate the workflows per project, Androidx might become special though. Having one single skeleton to maintain would reduce code duplication.

[etiennestuder]

@jprinet let's please start simple. there is no need to do more than what we want for the OSS projects. it's also much simpler to review and evolve this way.

[jprinet]

My idea was to have an optional input when requiring wsl-bash however, the step just fails when the interpreter is not present.
We could have some dedicated composite with the wsl-bash, which would require the caller to handle the conditional call.

@jprinet let's please start simple. there is no need to do more than what we want for the OSS projects. it's also much simpler to review and evolve this way.

Absolutely @etiennestuder, we'll keep it as is for the moment and we can consider integrating with the cross platform tests as another task.