[CI Failure] GitHub artifact upload fails with ECONNRESET network error

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/30957939475
Build error leg: Tests / RabbitMQ.Client / RabbitMQ.Client (ubuntu-latest)
Pull request: #18987

## Error Message

```
Failed to CreateArtifact: Unable to make request: ECONNRESET
```

## Description

GitHub artifact upload fails with ECONNRESET network error

**Type**: infra-failure

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-08-04 | [30957939475](https://github.com/microsoft/aspire/actions/runs/30957939475) | Tests / RabbitMQ.Client / RabbitMQ.Client (ubuntu-latest) | #18987 |
| 2026-09-14 | [34870408493](https://github.com/microsoft/aspire/actions/runs/34870408493) | Tests / No-package tests (regular, Aspire.Hosting.Orleans.Tests, Hosting.Orleans, Hosting.Orleans, tests/... / Hosting.Orleans (ubuntu-latest) | #20039 |

Start with GitHub Actions runs 30957939475 and 34870408493, focusing on the listed jobs and the Failed to CreateArtifact ECONNRESET message. Compare the two occurrences and the relevant workflow configuration to determine whether the failure is transient or reproducible; done means identifying the cause and establishing reliable artifact handling.

Written by the indexing model from the issue text.