For testing / future - Ubuntu 24.04 Dockerfile

[jquagga]

So when I proposed the dual-stage build for the Dockerfile I said that the libraries would probably change when Ubuntu rolled forward and Ubuntu just rolled forward. I chased down the dependencies and this Dockerfile builds trunk-recorder and it seems to work in my light testing.

This does change a bit about the prior Dockerfile. This version doesn't build rtl-sdr or gr-osmosdr; it sources them from Ubuntu upstream. Nobel is new enough to have rtlv4 support in it. That coupled with the fork of gr-osmosdr used in the previous Dockerfile not being happy building in 24.04 at the moment led me to move both back to upstream.

[jquagga]

Ok it took a minute to get the dependencies right. It seems picky on 32-bit arm whereas amd64 worked with all 3 versions here. But it finally builds in workflow.