gha/rpk-build: test and build multi os and arch

[andrewhsu]

jira: DEVPROD-2669

The variables in the matrix of rpk-build.yml were not used, so all matrix tests were compiled and run on linux amd64.

This PR changes the workflow to run gotestsum on:

1. linux amd64
2. darwin arm64

And build (cross-compile) for:

1. linux arm64
2. darwin amd64
3. windows amd64
4. windows arm64

Ref:

• https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/running-variations-of-jobs-in-a-workflow
• https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#standard-github-hosted-runners-for-public-repositories

Backports Required

• none - not a bug fix
• none - this is a backport
• none - issue does not exist in previous branches
• none - papercut/not impactful enough to backport
• v24.3.x
• v24.2.x
• v24.1.x

Release Notes

• none

[r-vasquez]

LGTM, thanks for doing this, however, I would prefer to keep testing for darwin. Leaving the test out for Windows is ok for now until we fully commit to support windows.

[andrewhsu]

LGTM, thanks for doing this, however, I would prefer to keep testing for darwin. Leaving the test out for Windows is ok for now until we fully commit to support windows.

@r-vasquez i've added git commit c721fb2 to test on darwin

ready for re-review

[r-vasquez]

Thanks!

[vbotbuildovich]

/backport v24.3.x

[vbotbuildovich]

/backport v24.2.x

[vbotbuildovich]

/backport v24.1.x

[vbotbuildovich]

Failed to create a backport PR to v24.2.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-25167-v24.2.x-925 remotes/upstream/v24.2.x
git cherry-pick -x c21ef731b1 c721fb252d

Workflow run logs.

[vbotbuildovich]

Failed to create a backport PR to v24.1.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-25167-v24.1.x-744 remotes/upstream/v24.1.x
git cherry-pick -x c21ef731b1 c721fb252d

Workflow run logs.