Pre-Connect Shell Script does not run within SSH session

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## What did you do?

I selected "Connect via SSH Tunnel" and "Pre-Connect Shell Script"

- My SSH session is with user `ubuntu`
- My pre-connect script looks like:
```
cd ~
pwd >&2
exit 1
```

## What did you expect to happen?

Per https://eggerapps.at/postico2/documentation/connection-preconnect-script.html,

> The pre-connect shell script is executed just before Postico connects to the PostgreSQL server. If you are using an SSH tunnel, the script is executed after the SSH tunnel has been established.

Therefore, I expected an error with the logged out directory to be `/home/ubuntu`, as it is when I ssh into the box and do `pwd` from the home

## What actually happened?

The pre-connect runs on my local machine, as evidenced by not finding the file with my MacOS path in the error message as opposed to the linux path within the machine I've SSH'ed into.

```
Command failed with status 1:
/Users/mymacusername
```

## What software versions are you using?

Postico version:
Version 2.1.2 (9702)

macOS version:
Version 13.1 (22C65)

PostgreSQL version:
(execute the command "SELECT VERSION();" to find out)

Not relevant

Start by reproducing the issue with a PostgreSQL connection using an SSH tunnel and the reported pre-connect script, comparing the local and remote working directories. Done means the script runs on the SSH host after the tunnel is established and reports `/home/ubuntu` rather than the local macOS path.

Written by the indexing model from the issue text.