Fixes https://github.com/coder/coder/issues/17840
NOTE: calling this out as a breaking change so that it is highly visible
in the changelog.
* CLI: Modifies `coder update` to stop the workspace if already running.
* UI: Modifies "update" button to always stop the workspace if already
running.
Refactor the workspace SSH command syntax across the project to use the
"workspace.coder" format instead of "coder.workspace". This standardizes
the SSH host entries for better consistency and clarity.
This is a follow-up from #17445 and recommends using the suffix-based
format for all new Coder versions.
<img width="418" alt="image"
src="https://github.com/user-attachments/assets/3893f840-9ce1-4803-a013-736068feb328"
/>
