[release/7.0] Switch to consolidated Windows build images (#44350)

- incomplete w/o updates in spa-templates and a submodule update here

Author: dougbu

.azure/pipelines/azure-pipelines-mirror-within-azdo.yml

@@ -4,7 +4,7 @@ trigger:
   branches:
     include:
     - internal/release/6.0
-    
+
 parameters:
 # Run the pipeline manually (usually disallowed)
 - name: manualRun
@@ -27,7 +27,7 @@ jobs:
         enableSBOM: false
         pool:
           name: NetCore1ESPool-Svc-Internal
-          demands: ImageOverride -equals Build.Server.Amd64.VS2019
+          demands: ImageOverride -equals 1es-windows-2019
         variables:
         - name: WorkingDirectoryName
           value: repo-dir

.azure/pipelines/ci.yml

@@ -757,7 +757,7 @@ stages:
           - Source_Build_Managed
         pool:
           name: NetCore1ESPool-Svc-Internal
-          demands: ImageOverride -equals Build.Server.Amd64.VS2019
+          demands: ImageOverride -equals 1es-windows-2019
         publishUsingPipelines: ${{ variables._PublishUsingPipelines }}
         enablePublishBuildArtifacts: true # publish artifacts/log files
     - ${{ if and(ne(variables['System.TeamProject'], 'public'), or(eq(parameters.testSourceIndexing, 'true'), eq(variables['Build.SourceBranch'], 'refs/heads/main'))) }}:
@@ -796,7 +796,7 @@ stages:
         pool:
           name: NetCore1ESPool-Svc-Internal
           # Visual Studio Enterprise - no BuildTools agents exist internally and job must run on Windows
-          demands: ImageOverride -equals Build.Server.Amd64.VS2019
+          demands: ImageOverride -equals 1es-windows-2019
         steps:
           - task: DownloadBuildArtifacts@0
             inputs: