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>

tests/fixtures/install-tree/claude.json

@@ -162,6 +162,7 @@
   "gsd-core/references/user-story-template.md",
   "gsd-core/references/verification-overrides.md",
   "gsd-core/references/verification-patterns.md",
+  "gsd-core/references/verifier-phase-gates.md",
   "gsd-core/references/verifier-wiring-patterns.md",
   "gsd-core/references/verify-mvp-mode.md",
   "gsd-core/references/workstream-flag.md",
@@ -365,7 +366,6 @@
   "gsd-core/workflows/update.md",
   "gsd-core/workflows/update/steps/channel-banner.md",
   "gsd-core/workflows/validate-phase.md",
-  "gsd-core/workflows/verify-phase.md",
   "gsd-core/workflows/verify-work.md",
   "gsd-core/workflows/verify-work/steps/automated-ui-verification.md",
   "gsd-core/workflows/verify-work/steps/mvp-uat-framing.md",