runtime: crossgen-comparison Linux arm checked fails with timeouts

Log example:

Starting: Run native crossgen and compare output to baseline (Unix)
==============================================================================
Task         : Command line
Description  : Run a command line script using Bash on Linux and macOS and cmd.exe on Windows
Version      : 2.151.2
Author       : Microsoft Corporation
Help         : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/command-line
==============================================================================
Generating script.
Script contents:
$BUILD_SOURCESDIRECTORY/eng/common/msbuild.sh $BUILD_SOURCESDIRECTORY/eng/common/helixpublish.proj /restore /t:Test /bl:$BUILD_SOURCESDIRECTORY/artifacts/log/$BuildConfig/SendToHelix.binlog
========================== Starting Command Output ===========================
/bin/bash --noprofile --norc /__w/_temp/7553b9eb-4204-4db6-9f64-3d08371fe862.sh
/__w/3/s/.dotnet/sdk/5.0.100-alpha1-015772/MSBuild.dll /nologo -distributedlogger:Microsoft.DotNet.Tools.MSBuild.MSBuildLogger,/__w/3/s/.dotnet/sdk/5.0.100-alpha1-015772/dotnet.dll*Microsoft.DotNet.Tools.MSBuild.MSBuildForwardingLogger,/__w/3/s/.dotnet/sdk/5.0.100-alpha1-015772/dotnet.dll -maxcpucount /m -verbosity:m /v:minimal /bl:/__w/3/s/artifacts/log/Checked/SendToHelix.binlog /clp:Summary /nr:true /p:TreatWarningsAsErrors=true /p:ContinuousIntegrationBuild=false /restore /t:Test /warnaserror /__w/3/s/eng/common/helixpublish.proj
  Restore completed in 599.36 ms for /__w/3/s/eng/common/helixpublish.proj.
  Restore completed in 2.35 ms for /__w/3/s/eng/common/helixpublish.proj.
  Starting Azure Pipelines Test Run (Ubuntu.1804.Arm32.Open)Ubuntu.1804.Armarch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7-30f6673-20190814153226
  Uploading payloads for Job on (Ubuntu.1804.Arm32.Open)Ubuntu.1804.Armarch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7-30f6673-20190814153226...
  Finished uploading payloads for Job on (Ubuntu.1804.Arm32.Open)Ubuntu.1804.Armarch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7-30f6673-20190814153226...
  Sending Job to (Ubuntu.1804.Arm32.Open)Ubuntu.1804.Armarch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7-30f6673-20190814153226...
  Sent Helix Job 40b0be17-33d6-41c3-bdce-fd02aba91a98
  Waiting for completion of job 40b0be17-33d6-41c3-bdce-fd02aba91a98
##[error]The operation was canceled.
Finishing: Run native crossgen and compare output to baseline (Unix)

https://dev.azure.com/dnceng/public/_build/results?buildId=471248