This is a mega-change, but attempting to split this up further is
probably not worth the effort.
Summary:
1. Bump up bazel, rules_go, and others.
2. Switch to new go target naming (bye bye go_default_library)
3. Move go deps to go.mod/go.sum, use make gazelle generate from that
4. Bump up Python deps a bit
And also whatever was required to actually get things to work - loads of
small useless changes.
Tested to work on NixOS and Ubuntu 20.04:
$ bazel build //...
$ bazel test //...
Change-Id: I8364bdaa1406b9ae4d0385a6b607f3e7989f98a9
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1583
Reviewed-by: q3k <q3k@hackerspace.pl>
