Restore MUXControls GitHub validation wrapper (#11265)

build/WinUI-GitHub-PR.yml

@@ -151,7 +151,7 @@ extends:
           MUXFinalRelease: ${{ parameters.MUXFinalRelease }}
           runStaticAnalysis: ${{ parameters.runStaticAnalysis }}
           pgoBuildModeMSBuildArg: '/p:PGOBuildMode=Off'
-          buildProductOnly: true
+          buildProductOnly: false
           dependsOn: ValidateGitHubPrContext
 
     - ${{ if and(eq(parameters.runFullValidation, true), eq(parameters.MUXFinalRelease, false)) }}:
@@ -163,7 +163,7 @@ extends:
           MUXFinalRelease: true
           runStaticAnalysis: ${{ parameters.runStaticAnalysis }}
           pgoBuildModeMSBuildArg: '/p:PGOBuildMode=Off'
-          buildProductOnly: true
+          buildProductOnly: false
           dependsOn: ValidateGitHubPrContext
 
     - ${{ if eq(parameters.runFullValidation, true) }}: