Use Enterprise Queue to reduce provisioning issues (#11434)

Author: John Luo

.azure/pipelines/jobs/default-build.yml

@@ -104,12 +104,8 @@ jobs:
           queue: BuildPool.Windows.10.Amd64.VS2019.Open
       ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         name: NetCoreInternal-Pool
-        ${{ if ne(parameters.isTestingJob, true) }}:
-          # Visual Studio Build Tools
-          queue: BuildPool.Windows.10.Amd64.VS2019.BT
-        ${{ if eq(parameters.isTestingJob, true) }}:
-          # Visual Studio Enterprise - contains some stuff, like SQL Server and IIS Express, that we use for testing
-          queue: BuildPool.Windows.10.Amd64.VS2019
+        # Visual Studio Enterprise - contains some stuff, like SQL Server and IIS Express, that we use for testing
+        queue: BuildPool.Windows.10.Amd64.VS2019
   variables:
     AgentOsName: ${{ parameters.agentOs }}
     ASPNETCORE_TEST_LOG_MAXPATH: "200" # Keep test log file name length low enough for artifact zipping