Error installing ConfigurationforLinux on FreeBSD

Seeing the following error in the log:
```
[ExtensionOperationError] Non-zero exit code: 127, /var/lib/waagent/Microsoft.GuestConfiguration.ConfigurationforLinux-1.26.38/bin/guest-configuration-shim install
[stdout]

[stderr]
/bin/sh: /var/lib/waagent/Microsoft.GuestConfiguration.ConfigurationforLinux-1.26.38/bin/guest-configuration-shim: not found
```

Environment:
```
# waagent --version
WALinuxAgent-2.2.54.2 running on freebsd 13.1
Python: 3.8.13
Goal state agent: 2.2.54.2
```
Also tried on:
```
# waagent --version
WALinuxAgent-2.2.54.2 running on freebsd 12.3
Python: 3.8.12
Goal state agent: 2.2.54.2
```
Looks like there are a couple of issue with the script that prevent it from running on FreeBSD.