Update how timeout is defined in yml files. (#1078)

azure-pipelines.yml

@@ -36,5 +36,4 @@ jobs:
         queue: buildpool.windows.10.amd64.vs2019.pre
       # runAsPublic is used in expressions, which can't read from user-defined variables
       runAsPublic: false
-    timeoutInMinutes: 120 # how long to run the job before automatically cancelling; see https://github.com/dotnet/wpf/issues/952
 

eng/pipeline.yml

@@ -26,6 +26,7 @@ jobs:
 
     jobs:
     - job: Windows_NT
+      timeoutInMinutes: 120  # how long to run the job before automatically cancelling; see https://github.com/dotnet/wpf/issues/952
       pool: ${{ parameters.agentPool }}
       variables:
         # needed for signing