fix: Removed use of Inline Yaml in GHA

[kunal-511]

• refactored the GitHub Actions workflows to use committed YAML files in the testing/gh-actions/resources/ folder instead of inline YAML commands.
• Made the helper scripts executable

[kunal-511]

cc: @juliusvonkohout @kimwnasptd

[juliusvonkohout]

please prefix the files, such that it is clear to which component the test files belong

[juliusvonkohout]

@kunal-511 i talked to @kimwnasptd and he wants to review it for now.

[kimwnasptd]

/lgtm

Let's resolve the conflicts and we can merge

[kunal-511]

/lgtm

Let's resolve the conflicts and we can merge

resolved

[kimwnasptd]

Looking at how this PR is developing, I personally don't like how we are now ending up having test files for components in a different place from those components.

I'll approve for now, but I think it's worth discussing whether it makes sense to move the integration tests logic inside each component. And in testing/gh-actions to have more generic files needed, like installing dependencies, KinD etc

[kimwnasptd]

Either way, nice work @kunal-511!

/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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[kimwnasptd]

/ok-to-test

[kimwnasptd]

/lgtm