Misleading error message when installer can't reach servers(?)

I'm trying to install CachyOS while connected via a security solution that "opens" TLS traffic through the use of a CA certificate.

Although I have a perfectly working internet connection, the installer prints the misleading message "An active network connection could not be detected", albeit the network connection being very active indeed ;) It even asks me to use WIFI, which would not improve the situation one bit, as it's the same network anyway.

```
[liveuser@CachyOS ~]$ sudo cachyos-installer
An active network connection could not be detected, waiting 15 seconds ...
An active network connection could not be detected, do you want to connect using wifi? [y/n]
```

The message (or the test?) probably should be closer to the truth and report "the installation repo servers could not be reached" or something.

Same is true for the GUI installer by the way, it complained about not having an internet connection at all, while the internet connection itself was perfectly fine.

See also https://github.com/CachyOS/cachyos-calamares/issues/167

Start at the cachyos-installer network-check path and reproduce the behavior described when TLS traffic is intercepted by a security solution with a CA certificate. Determine whether the failure is local connectivity or inability to reach installation repository servers, then make the reported condition accurate and verify the CLI behavior; the linked GUI issue is separate scope.

Written by the indexing model from the issue text.