ci: support VRT snapshots and fix 403/ambiguous workflow errors (#9690)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: arii <342438+arii@users.noreply.github.com>

Author: arii

.github/workflows/conflict-resolver.yml

@@ -122,7 +122,7 @@ jobs:
           HEAD_SHA: ${{ steps.commit_push.outputs.resolved_sha }}
           BASE_SHA: ${{ steps.validate_branches.outputs.base_sha }}
         run: |
-          gh workflow run "Gemini Orchestrator" --ref "$SOURCE" -f pr_number="$PR_NUMBER" -f base_ref="$BASE_SHA" -f head_ref="$HEAD_SHA" -f base_branch="$TARGET"
+          gh workflow run "pr-orchestrator.yml" --ref "$SOURCE" -f pr_number="$PR_NUMBER" -f base_ref="$BASE_SHA" -f head_ref="$HEAD_SHA" -f base_branch="$TARGET"
 
       - name: Update comment on success
         if: steps.validate_branches.outputs.skipped != 'true' && success() && steps.resolve.outputs.unresolved-files == '' && env.PR_NUMBER && env.PR_NUMBER != '0'