[Build] Update the static validation job to use an MMS2022 image that contains a 1ESPT artifact (#6300)

* Add demands for custom pool in YAML pipeline

* Update WindowsAppSDK-BuildInstaller-Stage.yml

* Add demands to WindowsAppSDK-BuildVSIX-Stage.yml

Added demands for the build pool to prevent errors.

Author: alexlamtest

build/AzurePipelinesTemplates/WindowsAppSDK-BuildInstaller-Stage.yml

@@ -10,6 +10,8 @@ stages:
       type: windows
       isCustom: true
       name: 'ProjectReunionESPool-2022' # This stage is purely for validation
+      # If we just let the pool give us MMS2022, we will get an error saying an artifact for 1ESPT is missing
+      demands: ImageOverride -equals MMS2022-1ES-GPT      
     strategy:
       maxParallel: 10
       matrix:

build/AzurePipelinesTemplates/WindowsAppSDK-BuildVSIX-Stage.yml

@@ -10,6 +10,8 @@ stages:
       type: windows
       isCustom: true
       name: 'ProjectReunionESPool-2022' # This stage is purely for validation
+      # If we just let the pool give us MMS2022, we will get an error saying an artifact for 1ESPT is missing
+      demands: ImageOverride -equals MMS2022-1ES-GPT      
     variables:
       ob_outputDirectory: '$(REPOROOT)\out'
       ob_artifactBaseName: "VSIX"

build/AzurePipelinesTemplates/WindowsAppSDK-StaticValidationTest-Stage.yml

@@ -13,6 +13,8 @@ stages:
       type: windows
       isCustom: true
       name: 'ProjectReunionESPool-2022' # This stage is purely for ES, hence this custom pool
+      # If we just let the pool give us MMS2022, we will get an error saying an artifact for 1ESPT is missing.
+      demands: ImageOverride -equals MMS2022-1ES-GPT      
     timeoutInMinutes: 120
     steps:
     - task: NuGetAuthenticate@1