Skip crossgen2 publishing for comparison jobs

Author: am11

eng/pipelines/coreclr/templates/crossgen2-comparison-build-job.yml

@@ -98,7 +98,7 @@ jobs:
         displayName: 'product build'
 
     # Populate Core_Root
-    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(buildConfig) $(archType) $(crossArg) generatelayoutonly
+    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(buildConfig) $(archType) $(crossArg) generatelayoutonly -p: -p:Crossgen2Supported=false
       displayName: Populate Core_Root
 
     # Create work item directory and populate with assemblies

eng/pipelines/coreclr/templates/crossgen2-comparison-job.yml

@@ -94,7 +94,7 @@ jobs:
         displayName: 'product build'
 
     # Populate Core_Root
-    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(buildConfig) $(archType) $(crossArg) generatelayoutonly
+    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(buildConfig) $(archType) $(crossArg) generatelayoutonly -p:Crossgen2Supported=false
       displayName: Populate Core_Root
 
     - task: DownloadPipelineArtifact@2