Fix support for compiling on Ubuntu 22.04

[progval]

Hi,

I noticed build is broken on Ubuntu 22.04. This PR adds CI for this version in addition to 20.04 (GitHub is currently moving ubuntu-latestfrom 20.04 to 22.04, but this repo was not migrated yet).

There is an ugly fix that seems to be enough to fix compilation with OpenSSL 3 (#182), but now it seems there are a bunch of link issues with glibc:

2022-12-06T19:40:07.2675814Z /usr/bin/ld: res.o: in function `query_name':
2022-12-06T19:40:07.2676638Z /home/runner/work/bahamut/bahamut/src/res.c:622: undefined reference to `__res_mkquery'
2022-12-06T19:40:07.2677194Z /usr/bin/ld: res.o: in function `proc_answer':
2022-12-06T19:40:07.2839313Z /home/runner/work/bahamut/bahamut/src/res.c:870: undefined reference to `__dn_expand'
2022-12-06T19:40:07.2840548Z /usr/bin/ld: /home/runner/work/bahamut/bahamut/src/res.c:968: undefined reference to `__dn_expand'
2022-12-06T19:40:07.2841219Z make[1]: Leaving directory '/home/runner/work/bahamut/bahamut/src'
2022-12-06T19:40:07.2842219Z /usr/bin/ld: /home/runner/work/bahamut/bahamut/src/res.c:1138: undefined reference to `__dn_expand'
2022-12-06T19:40:07.2842517Z Building doc
2022-12-06T19:40:07.2843444Z /usr/bin/ld: /home/runner/work/bahamut/bahamut/src/res.c:1270: undefined reference to `__dn_expand'

and I can't figure how to resolve them

Feel free to pick up from this.

[progval]

closing in favor of #219