pin AppHarness tests to ubuntu-22.04 runner (#4173)

.github/workflows/check_node_latest.yml

@@ -14,7 +14,7 @@ env:
 
 jobs:
     check_latest_node:
-        runs-on: ubuntu-latest
+        runs-on: ubuntu-22.04
         strategy:
             matrix:
                 python-version: ['3.12']

.github/workflows/integration_app_harness.yml

@@ -24,7 +24,7 @@ jobs:
       matrix:
         state_manager: ['redis', 'memory']
         python-version: ['3.11.5', '3.12.0']
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     services:
       # Label used to access the service container
       redis: