GitHub Actions: Evaluate to replace `always()` by `'!cancelled()'`

[mfranzke]

Currently we're using if: always() as a condition at some places in our GitHub workflows. Probably if: '!cancelled()' would work better for most contexts as it would take into account whether the pipeline run has been cancelled in the meantime instead of always continue running it anyhow.

Additionally, as pointed out below, putting always() will cause the function to run even if the build is canceled. If you don't want the function to run when you manually cancel a job, you can instead put:

source: https://stackoverflow.com/questions/58858429/how-to-run-a-github-actions-step-even-if-the-previous-step-fails-while-still-f

Further information:

• https://docs.github.com/en/actions/reference/workflows-and-actions/workflow-cancellation

We even already had our first successful fix: #4672