Async2TaskAdapters.TestValueTaskOfTaskValueVersusAsync fails with SanityCheck() in Wasm R2R test

## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1596797
Build error leg or test failing: async.WorkItemExecution
Pull request: https://github.com/dotnet/runtime/pull/133825

## Error Message

**DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK** otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

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

```json
{
"ErrorMessage": "System.Runtime.CompilerServices.AsyncHelpers::Await, IR_0003",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1596797
**Error message validated:** `[System.Runtime.CompilerServices.AsyncHelpers::Await, IR_0003`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 9/15/2026 2:43:03 PM UTC

### Report

|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1597684](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597684)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597684&view=ms.vss-test-web.build-test-results-tab&runId=44109062&resultId=102505)|dotnet/runtime#133827|
|[1597671](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597671)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597671&view=ms.vss-test-web.build-test-results-tab&runId=44108170&resultId=101641)|dotnet/runtime#133932|
|[1597563](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597563)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597563&view=ms.vss-test-web.build-test-results-tab&runId=44105056&resultId=102259)|dotnet/runtime#133046|
|[1597549](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597549)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597549&view=ms.vss-test-web.build-test-results-tab&runId=44103998&resultId=101962)|dotnet/runtime#132448|
|[1597497](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597497)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597497&view=ms.vss-test-web.build-test-results-tab&runId=44103028&resultId=102522)|dotnet/runtime#133696|
|[1597532](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597532)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597532&view=ms.vss-test-web.build-test-results-tab&runId=44103170&resultId=102491)|dotnet/runtime#132572|
|[1597064](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597064)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1597064&view=ms.vss-test-web.build-test-results-tab&runId=44089872&resultId=102812)|dotnet/runtime#133934|
|[1596878](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1596878)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1596878&view=ms.vss-test-web.build-test-results-tab&runId=44082384&resultId=102488)|dotnet/runtime#133922|
|[1596797](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1596797)|dotnet/runtime|[async.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1596797&view=ms.vss-test-web.build-test-results-tab&runId=44080094&resultId=102262)|dotnet/runtime#133825|
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|9|9|9|

Start with Async2TaskAdapters.TestValueTaskOfTaskValueVersusAsync in the async.WorkItemExecution test results and inspect the reported System.Runtime.CompilerServices.AsyncHelpers::Await, IR_0003 failure. Compare the referenced build and pull requests, then verify that the Wasm R2R test completes without the SanityCheck() failure.

Written by the indexing model from the issue text.