Disable auth in embedded etcd

[Tomy2e]

How to categorize this PR?

/area backup
/kind bug

What this PR does / why we need it:

This PR temporarily disables etcd authentication after starting the embedded etcd (if needed). It's enabled again before stopping the embedded etcd server.

Which issue(s) this PR fixes:
Fixes #950

Special notes for your reviewer:

Release note:

Fixed the restoration failures that could occur when etcd backups was taken from etcd which has auth enabled.

[CLAassistant]

All committers have signed the CLA.

[gardener-prow]

Hi @Tomy2e. Thanks for your PR.

I'm waiting for a github.com 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[gitguardian]

️✅ There are no secrets present in this pull request anymore.

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[Tomy2e]

Hi @ishan16696, my fix is ready for review 🙏

It looks like gitguardian secret scanner doesn't like the password I hardcoded in my test:

etcd-backup-restore/pkg/snapshot/restorer/restorer_test.go

Line 1101 in b60e1c8

rootPassword = "toor"

Do not hesitate to let me know if there is something I can do to fix that.

[ishan16696]

/assign

[ishan16696]

thanks for the PR, few nits ....overall it looks good.

[ishan16696]

LGTM!!