Added the scorecard github action and its badge

[ivankatliarchuk]

Description

Fixes #4673

PR to add the Scorecard GitHub Action and its badge in the README file.

Similar PR helm/helm#13233

Checklist

• Unit tests updated
• End user documentation updated

[k8s-ci-robot]

Hi @ivankatliarchuk. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[ivankatliarchuk]

All my reply are in pending state. Not sure bug or smth.
Docs https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#onevent_nametypes

[mloiseleur]

/lgtm
/assign @Raffo
for final review

[Raffo]

I am not sure I like to have this added to the project. From what I can see, the OpenSSF scorecard is really not that great and gives you easily a wrong score for things that improve the project by a very small amount. We currently get a 6.9 (https://securityscorecards.dev/viewer/?uri=github.com/kubernetes-sigs/external-dns) which seems to be kinda bad, but the results need to be interpreted. I am not sure or maybe I even doubt that our users will be able to determine if it's something to worry about or not. A similar discussion has been done in the curl project.

For now, I'll put this on hold.

/hold

[k8s-ci-robot]

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[k8s-ci-robot]

PR needs rebase.

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