incorrect apiclient exec argument parsing

**Image I'm using:**
`aws-dev`

**What I expected to happen:**
`apiclient` should pass the `-v` argument to the executed command.
```
$ apiclient exec admin uname -v
#1 SMP Thu Nov 9 07:59:43 UTC 2023
```

**What actually happened:**
`apiclient` interprets the `-v` itself, sets verbose mode, and does not pass the argument to the executed command.
```
$ apiclient exec admin uname -v
16:15:01 [DEBUG] (1) apiclient::exec::terminal: Detected tty: true
16:15:01 [DEBUG] (1) apiclient::exec::terminal: Setting terminal to raw mode, sorry about the carriage returns
...
Linux
```

**How to reproduce the problem:**
See above.

Start at the apiclient exec argument-parsing entry point and reproduce the reported command with `apiclient exec admin uname -v`. Trace how `-v` is classified, then verify that it reaches `uname` rather than enabling apiclient verbose logging; the command should print the kernel version without apiclient debug output.

Written by the indexing model from the issue text.