[CI Failure] Aspire.Cli.Tests (ubuntu-latest) job fails with generic exit code 2, unrelated to PR changes

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/34740434278
Build error leg: Tests / No-package tests (regular, Infrastructure.Tests, Infrastructure, Infrastructure, tests/Infrastruc... / Infrastructure (ubuntu-latest)
Pull request: #20020

## Error Message

```
Process completed with exit code 2. (Run tests (Linux/macOS) step failed; job logs unavailable: 'Failed to fetch logs for job'). No TRX test failures extracted. PR only modifies extension/ files, unrelated to Aspire.Cli.Tests.
```

## Description

Aspire.Cli.Tests (ubuntu-latest) job fails with generic exit code 2, unrelated to PR changes

**Type**: flaky-test

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-09-13 | [34740434278](https://github.com/microsoft/aspire/actions/runs/34740434278) | Tests / No-package tests (regular, Infrastructure.Tests, Infrastructure, Infrastructure, tests/Infrastruc... / Infrastructure (ubuntu-latest) | #20020 |
| 2026-09-14 | [34791816809](https://github.com/microsoft/aspire/actions/runs/34791816809) | Tests / No-package tests (regular, Aspire.Cli.Tests, Cli, Cli, tests/Aspire.Cli.Tests/Aspire.Cli.Tests.cs... / Cli (macos-latest) | #20099 |

Start with build 34740434278 and the failing Tests / No-package tests job for Aspire.Cli.Tests on ubuntu-latest; compare it with the listed macOS occurrence and inspect the available job context. The issue is done when the unrelated exit-code-2 failure is explained and the affected CI test job no longer flakes.

Written by the indexing model from the issue text.