baseservices failing for coreclr runtime-extra-platforms testing with "Process mlaunch exited with 1"

Example pipeline run: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625&view=results
Example console log: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-bcc6da633d0b472aaa/baseservices/1/console.4a163b50.log

```
[22:55:36] dbug: Running /private/tmp/helix/working/BFF00A1A/p/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26064.3/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
With env vars:
DOTNET_CI = 'true'
[22:55:38] dbug: Process mlaunch exited with 1
[22:55:38] dbug: Test run failed
```

## Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
Build error leg or test failing: baseservices-exceptions.WorkItemExecution
Pull request: https://github.com/dotnet/runtime/pull/124373

## 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": ["baseservices", "Process mlaunch exited with 1"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
**Error message validated:** `[baseservices.r2r.dylib Process mlaunch exited with 1`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 2/16/2026 11:49:14 AM UTC

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
**Error message validated:** `[baseservices Process mlaunch exited with 1`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 2/16/2026 11:54:46 AM UTC

### Report

|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1592487](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1592487)|dotnet/runtime|[baseservices-exceptions.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1592487&view=ms.vss-test-web.build-test-results-tab&runId=43962808&resultId=100072)|dotnet/runtime#133575|
|[1560940](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1560940)|dotnet/runtime|[baseservices-exceptions.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1560940&view=ms.vss-test-web.build-test-results-tab&runId=42976848&resultId=118589)||
|[1556412](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1556412)|dotnet/runtime|[baseservices-exceptions.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1556412&view=ms.vss-test-web.build-test-results-tab&runId=42835140&resultId=104041)||
|[1555560](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1555560)|dotnet/runtime|[baseservices-exceptions.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1555560&view=ms.vss-test-web.build-test-results-tab&runId=42813346&resultId=103796)||
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|1|4|