Add timeouts to our GitHub actions. (#4669)

6 hours is way too long and eats up the runners.

.github/workflows/integration-tests.yml

@@ -10,6 +10,7 @@ jobs:
   integration_tests:
     name: Integration Tests
     runs-on: macos-15
+    timeout-minutes: 45
 
     concurrency:
       # Only allow a single run of this workflow on each branch, automatically cancelling older runs.