System.Threading.Channels.Tests execution timed out

Failing on ARM64 Alpine

```
----- start Thu Nov 20 22:59:45 UTC 2025 =============== To repro directly: =====================================================
pushd .
/root/helix/work/correlation/dotnet exec --runtimeconfig System.Threading.Channels.Tests.runtimeconfig.json --depsfile System.Threading.Channels.Tests.deps.json xunit.console.dll System.Threading.Channels.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing
popd
===========================================================================================================
/root/helix/work/workitem/e /root/helix/work/workitem/e
Discovering: System.Threading.Channels.Tests (method display = ClassAndMethod, method display options = None)
Discovered: System.Threading.Channels.Tests (found 624 test cases)
Starting: System.Threading.Channels.Tests (parallel test collections = on [2 threads], stop on fail = off)
System.Threading.Channels.Tests.StressTests.CanceledReads [SKIP]
Condition(s) not met: "IsStressModeEnabled"
System.Threading.Channels.Tests.StressTests.ReadWriteVariations [SKIP]
Condition(s) not met: "IsStressModeEnabled"
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:02:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:04:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:06:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:08:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:10:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:12:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:14:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:16:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:18:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:20:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:22:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:24:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:26:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:28:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:30:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:32:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:34:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:36:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:38:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:40:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:42:17
System.Threading.Channels.Tests: [Long Running Test] 'System.Threading.Channels.Tests.UnboundedPrioritizedChannelTests.SingleProducerConsumer_PingPong_Success', Elapsed: 00:44:17
```

## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1208988
Build error leg or test failing: System.Threading.Channels.Tests.WorkItemExecution
Pull request: https://github.com/dotnet/runtime/pull/121834

## Error Message

Fill the error message using [step by step known issues guidance](https://github.com/dotnet/arcade/blob/main/Documentation/Projects/Build%20Analysis/KnownIssueJsonStepByStep.md).

```json
{
"ErrorMessage": ["System.Threading.Channels.Tests", "EXECUTION TIMED OUT"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1208988
**Error message validated:** `[System.Threading.Channels.Tests EXECUTION TIMED OUT`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 11/21/2025 7:57:37 AM UTC

### Report

|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1595328](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1595328)|dotnet/runtime|[System.Threading.Channels.Tests.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1595328&view=ms.vss-test-web.build-test-results-tab&runId=44047326&resultId=218591)|dotnet/runtime#133851|
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|1|1|1|