Resolve "Stop applying Engineering Allocations to new issues"

What does this MR do and why?

Stop any automation around the interaction with infradev and Engineering Allocation

Expected impact & dry-runs

These are strongly recommended to assist reviewers and reduce the time to merge your change.

Action items

• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Engineering week-in-review

Closes #954 (closed)