This PR updates the `cli: install` message for Linux. It initially threw
me off thinking that because `path_for_auxiliary_executable` is not
implemented for Linux it's failing and I thought it's a bug. Turns out
the CLI gets installed by the package manager and it's just named
something else.

I ended up only updating the message so it's more clear. If you don't
like the message, let me know :)

The old message:

![image](https://github.com/zed-industries/zed/assets/829535/1a02d08d-2c7a-452a-bfee-dc55d29c0c10)

The new message:

![image](https://github.com/user-attachments/assets/82052a43-1cf5-4b86-88e8-1c1f01a0ae3c)

@ConradIrwin thank you for taking the time and explaining it to me.

closes: #14118

Release Notes:

- N/A