WRKLDS-1716: oc serviceaccounts: Remove as deprecated

[tchap]

This range of commands has been deprecated for 2 years now.

[openshift-ci-robot]

@tchap: This pull request references WRKLDS-1716 which is a valid jira issue.

In response to this:

This range of commands has been deprecated for 2 years now.

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[tchap]

I am not entirely sure how serious is the usage in
https://github.com/search?q=org%3Aopenshift+%22oc+serviceaccounts%22&type=code

What do you think @ardaguclu ?

[openshift-ci]

@tchap: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/okd-scos-e2e-aws-ovn	24b17fc	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-aws-certrotation	24b17fc	link	false	/test e2e-aws-certrotation
ci/prow/e2e-aws-ovn	24b17fc	link	true	/test e2e-aws-ovn
ci/prow/e2e-metal-ipi-ovn-ipv6	24b17fc	link	false	/test e2e-metal-ipi-ovn-ipv6

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[tchap]

We need to align/remove the failing test.

[ardaguclu]

We need to align/remove the failing test.

Based on this comment https://github.com/openshift/origin/blob/9508b94995c110e3a6c988dbf35a8920bc36c3ed/test/extended/cli/admin.go#L478-L487, test needs to be updated to use create token instead of create serviceaccount

[tchap]

/hold

I am postponing this, also need to really make sure it's unused.