chore(#3421): delete orphan verify-phase workflow, migrate live gates to verifier (#3422)

* chore(#1892): delete orphan verify-phase workflow, migrate live gates to verifier reference

* test(#1892): retarget structural suites from verify-phase.md to verifier-phase-gates.md

* chore(#1892): reword retired-workflow mentions for removed-but-needed lint

* test(#1892): correct stale surface labels in retargeted suites

* docs(#1892): add verifier-phase-gates row to locale inventories

* chore(#3421): backfill changeset pr number

---------

Co-authored-by: sim <sim@local>

docs/INVENTORY-MANIFEST.json

@@ -199,7 +199,6 @@
       "undo.md",
       "update.md",
       "validate-phase.md",
-      "verify-phase.md",
       "verify-work.md"
     ],
     "references": [
@@ -299,6 +298,7 @@
       "user-story-template.md",
       "verification-overrides.md",
       "verification-patterns.md",
+      "verifier-phase-gates.md",
       "verifier-wiring-patterns.md",
       "verify-mvp-mode.md",
       "workstream-flag.md",