Update pipeline runner to 0.4
Background
There was previous work on updating the pipeline-runner image to 0.4, but this was never merged to master, and therefore never used w/in the CHT pipeline. We would like to update the pipeline to use this image in order to use updated versions of Skopeo/Podman/Buidlah.
AC
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pipeline-runner project's master branch updated to 0.4
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update pipeline to use new image
DoD
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Test updated runner in staging and validate all jobs can still run