Stop using Ubuntu 20.04 images (#20663)

Author: NikolaMilosavljevic

src/SourceBuild/content/eng/pipelines/source-build-sdk-diff-tests.yml

@@ -22,7 +22,7 @@ trigger: none
 
 pool:
   name: NetCore1ESPool-Svc-Internal
-  demands: ImageOverride -equals 1es-ubuntu-2004
+  demands: ImageOverride -equals 1es-ubuntu-2204
 
 parameters:
 - name: dotnetDotnetRunId

src/SourceBuild/content/eng/pipelines/templates/jobs/sdk-diff-tests.yml

@@ -20,7 +20,7 @@ jobs:
   timeoutInMinutes: 150
   pool:
     name: NetCore1ESPool-Svc-Internal
-    demands: ImageOverride -equals 1es-ubuntu-2004
+    demands: ImageOverride -equals 1es-ubuntu-2204
   variables:
   - template: ../variables/pipelines.yml
   steps:

src/SourceBuild/content/eng/pipelines/templates/stages/vmr-scan.yml

@@ -13,11 +13,11 @@ stages:
     pool:
       ${{ if eq(variables['System.TeamProject'], 'public') }}:
         name: $(DncEngPublicBuildPool)
-        image: 1es-ubuntu-2004-open
+        image: 1es-ubuntu-2204-open
         os: linux
       ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         name: $(DncEngInternalBuildPool)
-        image: 1es-ubuntu-2004
+        image: 1es-ubuntu-2204
         os: linux
 
     steps: