Temporarily disable outerloop crossgen comparison runs (dotnet#1695)

Disable crossgen comparison runs that systematically fail in
CoreCLR outerloop runs.

Tracking issue: dotnet#1282

Thanks

Tomas

eng/pipelines/coreclr/ci.yml

@@ -154,7 +154,9 @@ jobs:
  jobTemplate: /eng/pipelines/coreclr/templates/crossgen-comparison-job.yml
  buildConfig: release
  platforms:
- - Linux_arm
+ # Currently failing globally, should be uncommented once the tracking bug gets fixed:
+ # https://github.com/dotnet/runtime/issues/1282
+ # - Linux_arm
  helixQueueGroup: ci
  helixQueuesTemplate: /eng/pipelines/coreclr/templates/helix-queues-setup.yml