github: add arm builds

[neolynx]

Fixes #1199

Requirements

All new code should be covered with tests, documentation should be updated. CI should pass.

Description of the Change

• replace goxc and use go directly for debian builds
• debianize and use dpkg-buildpackage
• read go version from go.mod
• build FreeBSD, MacOS and Linux separately

TODO

• cleanup debian package / service

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.81%. Comparing base (4bc2180) to head (aa83fba).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1286   +/-   ##
=======================================
  Coverage   74.81%   74.81%           
=======================================
  Files         144      144           
  Lines       16248    16248           
=======================================
  Hits        12156    12156           
  Misses       3152     3152           
  Partials      940      940           

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[neolynx]

goxc does not seem to build for arm64:

ls -l build/
total 168736
-rw-r--r-- 1 root root 17893770 Apr 21 17:19 aptly_1.5.0+113+g6619f929_amd64.deb
-rw-r--r-- 1 root root 16546322 Apr 21 17:19 aptly_1.5.0+113+g6619f929_armhf.deb
-rw-r--r-- 1 root root 18089983 Apr 21 17:19 aptly_1.5.0+113+g6619f929_darwin_amd64.zip
-rw-r--r-- 1 root root 17016974 Apr 21 17:19 aptly_1.5.0+113+g6619f929_freebsd_386.zip
-rw-r--r-- 1 root root 17883988 Apr 21 17:19 aptly_1.5.0+113+g6619f929_freebsd_amd64.zip
-rw-r--r-- 1 root root 17057506 Apr 21 17:19 aptly_1.5.0+113+g6619f929_i386.deb
-rw-r--r-- 1 root root 17049372 Apr 21 17:19 aptly_1.5.0+113+g6619f929_linux_386.tar.gz
-rw-r--r-- 1 root root 17887161 Apr 21 17:19 aptly_1.5.0+113+g6619f929_linux_amd64.tar.gz
-rw-r--r-- 1 root root 16539569 Apr 21 17:19 aptly_1.5.0+113+g6619f929_linux_arm.tar.gz
-rw-r--r-- 1 root root 16802958 Apr 21 17:19 aptly_1.5.0+113+g6619f929_linux_arm64.tar.gz

-> depends on #1287