Wasm R2R: GC/Scenarios/DoublinkList/dlcollect/dlcollect.cmd timeout

## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1590167
Build error leg or test failing: GC/Scenarios/DoublinkList/dlcollect/dlcollect.cmd
Pull request: https://github.com/dotnet/runtime/pull/133528

## 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": "../DoublinkList/dlcollect/dlcollect.sh: line 491: 1078 Killed",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1590167
**Error message validated:** `[../DoublinkList/dlcollect/dlcollect.sh: line 491: 1078 Killed`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 9/10/2026 2:58:50 PM UTC

### Report

|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1590167](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1590167)|dotnet/runtime|[GC/Scenarios/DoublinkList/dlcollect/dlcollect.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1590167&view=ms.vss-test-web.build-test-results-tab&runId=43891746&resultId=103708)|dotnet/runtime#133528|
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|1|1|

Start with the linked Azure build and the GC/Scenarios/DoublinkList/dlcollect/dlcollect.cmd test result, then inspect dlcollect.sh around line 491 where the process was killed. Done means the test no longer times out or is killed and the associated build passes.

Written by the indexing model from the issue text.