iperf is still broken on 24.7.5_3

[em-winterschon]

iperf is still broken on version 24.7.5_3-amd64.

After install the plugin worked one time, and then it does the same thing that is described by previous comments. It shouldn't need ruby in the first place, both iperf and iperf3 are available in the FreeBSD repos with zero dependencies. Replace it, and reduce the attack footprint by removing the deps.

Originally posted by @em-winterschon in #3409 (comment)

[OPNsense-bot]

Thank you for creating an issue.
Since the ticket doesn't seem to be using one of our templates, we're marking this issue as low priority until further notice.

For more information about the policies for this repository,
please read https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md for further details.

The easiest option to gain traction is to close this ticket and open a new one using one of our templates.

[fichtner]

PRs welcome. Ruby dep was maintainer decision. A new maintainer could do whatever they decide. At the moment there is no active maintainer.

Cheers,
Franco