fix: Decouple graceful shutdown tests from the shell commands example - #13799

Analysis completed successfully.

Review Progress

• Getting PR details and context (0.1ms)
• Understanding the PR timeline (2.3s)
• Creating Vercel Sandbox (22.5s)
• Reading code guidelines (3.1s)
  • Found: AGENTS.md, crates/turborepo/ARCHITECTURE.md, CONTRIBUTING.md
• Analyzing PR (1m 25s)
• Posting review (3.1s)

Statistics

• Suggestions made: 0

Review ID: 3fea03cd67c68817977b4179498b7829