Set low priority for scheduled runs (#4678)

Author: castrodd

eng/ci/host-artifacts-build.yml

@@ -39,6 +39,9 @@ extends:
       name: 1es-pool-azfunc
       image: 1es-windows-2022
       os: windows
+      ${{ if eq( variables['Build.Reason'], 'Schedule' ) }}:
+        demands:
+        - Priority -equals Low
     sdl:
       codeql:
          compiled:

eng/ci/official-build.yml

@@ -41,6 +41,9 @@ extends:
       name: 1es-pool-azfunc
       image: 1es-windows-2022
       os: windows
+      ${{ if eq( variables['Build.Reason'], 'Schedule' ) }}:
+        demands:
+        - Priority -equals Low
     sdl:
       codeql:
          compiled:

eng/ci/public-build.yml

@@ -41,6 +41,9 @@ extends:
       name: 1es-pool-azfunc-public
       image: 1es-windows-2022
       os: windows
+      ${{ if eq( variables['Build.Reason'], 'Schedule' ) }}:
+        demands:
+        - Priority -equals Low
     sdl:
       codeql:
          compiled: