Fix OL9 setup - disable Centos Extras repo creation

[psvmcc]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Centos 9 doesn't exists, and Centos 9-stream also doesn't have extras repo.

TASK [bootstrap-os : Install EPEL for Oracle Linux repo package] ********************************************************************************************************************************************************
fatal: [node1]: FAILED! => {"changed": false, "msg": "Failed to download metadata for repo 'extras': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried", "rc": 1, "results": []}
fatal: [master2]: FAILED! => {"changed": false, "msg": "Failed to download metadata for repo 'extras': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried", "rc": 1, "results": []}

Does this PR introduce a user-facing change?:

Disable Centos Extras repo creation for OL9

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: psvmcc / name: Sergey Putko (c17ced3)

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[k8s-ci-robot]

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[floryut]

@psvmcc Thank you for the fix!
Can you please sign CLA though ?
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floryut, psvmcc

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[psvmcc]

@floryut signed, thanks!

[oomichi]

/lgtm