Provide extra properties for VMR build jobs (#20021)

eng/pipelines/templates/jobs/vmr-build.yml

@@ -57,6 +57,11 @@ parameters:
   type: boolean
   default: false
 
+# Freeform field for extra values to pass to build.sh for special build modes
+- name: extraProperties
+  type: string
+  default: ''
+
 jobs:
 - job: ${{ parameters.buildName }}_${{ parameters.architecture }}
   timeoutInMinutes: 150
@@ -230,7 +235,12 @@ jobs:
         customBuildArgs="$customBuildArgs --use-mono-runtime"
       fi
 
-      docker run --rm -v "$(sourcesPath):/vmr" -w /vmr $customRunArgs ${{ parameters.container }} ./build.sh --clean-while-building $(additionalBuildArgs) $customBuildArgs
+      extraProperties="${{ parameters.extraProperties }}"
+      if [[ -n "$extraProperties" ]]; then
+        extraProperties="-- $extraProperties"
+      fi
+
+      docker run --rm -v "$(sourcesPath):/vmr" -w /vmr $customRunArgs ${{ parameters.container }} ./build.sh --clean-while-building $(additionalBuildArgs) $customBuildArgs $extraProperties
     displayName: Build
 
   - script: |
@@ -244,7 +254,7 @@ jobs:
         poisonArg='--poison'
       fi
 
-      docker run --rm $dockerVolumeArgs -w /vmr $dockerEnvArgs ${{ parameters.container }} ./build.sh $poisonArg --run-smoke-test $(additionalBuildArgs) -- -p:SmokeTestConsoleVerbosity=detailed
+      docker run --rm $dockerVolumeArgs -w /vmr $dockerEnvArgs ${{ parameters.container }} ./build.sh $poisonArg --run-smoke-test $(additionalBuildArgs) -- -p:SmokeTestConsoleVerbosity=detailed ${{ parameters.extraProperties }}
     displayName: Run Tests
 
   # Don't use CopyFiles@2 as it encounters permissions issues because it indexes all files in the source directory graph.