Remove defunct release-3.5 arm64 github actions workflows

[jmhbnz]

These jobs have now been migrated to prow in:

• Migrate release-3.5 arm64 integration tests to prow kubernetes/test-infra#33733
• Migrate etcd release-3.5 arm64 smoke presubmit to prow kubernetes/test-infra#33734

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[jmhbnz]

/test all

[jmhbnz]

/test pull-etcd-integration-1-cpu-arm64
/test pull-etcd-integration-2-cpu-arm64
/test pull-etcd-integration-4-cpu-arm64

[ivanvc]

@jmhbnz, just a heads up that I'm also testing the prow jobs in this PR: #18784

[ivanvc]

LGTM. Thanks, @jmhbnz.

[ahrtr]

LGTM

Thanks

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, ivanvc, jmhbnz

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