Globally disable Windows ARM32 runs to reduce noise in CoreCLR runs (#…

…1687)

As we still don't have a final resolution w.r.t. a new Windows
queue to run ARM32 tests on, I propose globally disable them before
the issue is resolved. We're tracking the underlying problem in:

#1097
#1663
dotnet/core-eng#8490

Thanks

Tomas

eng/pipelines/common/platform-matrix.yml

@@ -223,7 +223,6 @@ jobs:
         ${{ insert }}: ${{ parameters.jobParameters }}
 
 # Windows arm
-
 - ${{ if or(containsValue(parameters.platforms, 'Windows_NT_arm'), eq(parameters.platformGroup, 'all')) }}:
   - template: xplat-setup.yml
     parameters:

eng/pipelines/coreclr/templates/helix-queues-setup.yml

@@ -115,10 +115,14 @@ jobs:
 
     # Windows_NT arm
     - ${{ if eq(parameters.platform, 'Windows_NT_arm') }}:
-      - ${{ if and(eq(variables['System.TeamProject'], 'public'), in(parameters.jobParameters.helixQueueGroup, 'pr', 'ci', 'corefx')) }}:
-        - Windows.10.Arm64.Open
-      - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
-        - Windows.10.Arm64
+    # Currently down as there's no suitable ARM32 pool at the moment, tracked under
+    #   https://github.com/dotnet/runtime/issues/1097
+    #   https://github.com/dotnet/runtime/issues/1663
+    #   https://github.com/dotnet/core-eng/issues/8490
+    #  - ${{ if and(eq(variables['System.TeamProject'], 'public'), in(parameters.jobParameters.helixQueueGroup, 'pr', 'ci', 'corefx')) }}:
+    #    - Windows.10.Arm64.Open
+    - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
+      - Windows.10.Arm64
 
     # Windows_NT arm64
     - ${{ if eq(parameters.platform, 'Windows_NT_arm64') }}: