Introduce new composite action that can be reused from other workflows to print the debug info

[jkremser]

Fix #946

By default it runs with verbose being set to false, however user can re-run the action from the
github's web UI with the enable debug checkbox (see the img) being checked. Then more info is printed.

example of usage from other workflows:

...
  - name: Print debug info
    if: always()
    uses: ./.github/actions/print-debug
...

It also adds terratests results to GITHUB_STEP_SUMMARY file, which is then visible on the workflow "landing page".

It prints:

• events
• evn vars
• gslbs
• dnsendpoints
• metrics
• logs
• /etc/hosts

example runs:

• default - non-verbose: https://github.com/jkremser/k8gb/actions/runs/2993177731/attempts/1
• verbose: https://github.com/jkremser/k8gb/actions/runs/2993177731

Signed-off-by: Jirka Kremser [email protected]

[kuritka]

good idea 👍

[jkremser]

@kuritka you've already approved this, but the CI was failing, because the composite action wanted to show the parsed terratest logs, but they were not parsed when called from the context of .github/workflows/terratest-more-clusters.yaml. That's why I had to add this commit 9126b18 It's a separate commit so that you can verify what has been changed since the last review and it will be squashed in the end.

[jkremser]

thanks