Pf 974 adds new update version workflow

[sindrej]

Same workflow as https://github.com/felleslosninger/github-workflows-internal/pull/34, just moved it to this repo

1. Added job summary to help with troubleshooting
2. Added product-name input to remove wildcard usage in find-and-replace
3. Improved error messages to help pinpoint issue

This new workflow will be called from each app repo from the existing call-buildimage.yml like so:

call-update-image-version:
    uses: felleslosninger/github-workflows-internal/.github/workflows/update-image-version.yml@PF-974-improve-update-version
    needs: call-workflow-image-build-publish
    with:
      application-name: plattform-test-app
      product-name: plattform
      kubernetes-repo: plattform-test-cd
      image-version: ${{ needs.call-workflow-image-build-publish.outputs.image-version }}
      image-digest: ${{ needs.call-workflow-image-build-publish.outputs.image-digest }}
      image-name: plattform-test-app
      slack-channel-id: "U058DDWGPJT"
      default-environment: systest
    secrets: inherit

Test run: https://github.com/felleslosninger/plattform-test-app/actions/runs/7288360846

[jasaltvik]

Veldig bra jobba!