cli/start: improper graceful drain upon stop trigger shutdown requests

**Describe the problem**

The shutdown logic in cli/start tries graceful drains when receiving shutdown requests. This is incorrect; currently all shutdown reasons require non-graceful shutdowns.

**Expected behavior**

For all the current reasons the code in cli/start should use a non-graceful shutdown.

Epic: CRDB-28893

Jira issue: CRDB-30548