Fixes: 8ab7b474

... because apt-key tool was deprecated [1].

[1] https://manpages.debian.org/testing/apt/apt-key.8.en.html

libjsoncpp1 was removed from bullseye package list. There is libjsoncpp24 but it will get installed as a dependency of libjsoncpp-dev anyways.

We do not need the build dependencies. The actual things we
need are the one built by `make install`.

This reverts commit f8d537d7