Remove automatic triage/needs-triage label creation

[sutaakar]

Issue link

What changes have been made

Remove workflow job adding triage/needs-triage label for new issues. Currently the triage is leveraging priority field.

Verification steps

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[openshift-ci]

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