using vs2019 agent pools

azure-pipelines.yml

@@ -39,6 +39,6 @@ phases:
   parameters:
     ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
       # agent pool can't be read from a user-defined variable (Azure DevOps limitation)
-      agentPool: dotnet-internal-temp
+      agentPool: dotnet-internal-temp-vs2019
       # runAsPublic is used in expressions, which can't read from user-defined variables
       runAsPublic: false
\ No newline at end of file

eng/pipeline.yml

 parameters:
 
   # Needed because agent pool can't be read from a user-defined variable (Azure DevOps limitation)
-  # Defaults to dotnet-external-temp
-  agentPool: dotnet-external-temp
+  # Defaults to dotnet-external-temp-vs2019
+  agentPool: dotnet-external-temp-vs2019
 
   # Needed because runAsPublic is used in template expressions, which can't read from user-defined variables
   # Defaults to true