Upgrade gh-aw to v0.74.0

Includes #31346: bundle transport fix for shallow checkouts.
Uses gh-aw-actions/setup (dedicated repo), not monorepo subtree.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mrjf

.github/aw/actions-lock.json

@@ -10,10 +10,10 @@
       "version": "v9.0.0",
       "sha": "3a2844b7e9c422d3c10d287c895573f7108da1b3"
     },
-    "github/gh-aw-actions/setup@v0.72.1": {
+    "github/gh-aw-actions/setup@v0.74.0": {
       "repo": "github/gh-aw-actions/setup",
-      "version": "v0.72.1",
-      "sha": "bc56a0cad2f450c562810785ef38649c04db812a"
+      "version": "v0.74.0",
+      "sha": "28ffccfcaa92868c8160807f95519789a590defc"
     },
     "github/gh-aw/actions/setup@v0.71.4": {
       "repo": "github/gh-aw/actions/setup",