Fix auto-tag: use git push + API pipeline trigger

Michael Teschrequested to merge
ft-fix-auto-tag into master

Summary

  • The tags API returns 403 with CI_JOB_TOKEN, so we can't create tags that way.
  • Instead: git push the tag (works with job token), then use the pipelines API to trigger a pipeline for the new tag ref (since git push from CI doesn't auto-trigger one).

Test plan

  • After merge, auto-tag should create v0.7.1 tag and trigger upload + release pipeline

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