With 7e87131ed (golangci-lint: Allow `testing.T` as first parameter,
2022-08-10) we set `context-as-argument` the sole argument to
`revive:rules`. This causes golangci-lint to disable all revive lints
that were previously enabled by default.
Re-enable the default revive lints by explicitly listing them in our
config. This triggers a large number of lint errors, resolve these as
well in this commit.
These files were directly copied over from 'gitlab-shell' in
823a6893bb4275f7d21035a34c778317af7d3d16. Let's fix the linter issues
pre-existing in these files.
Currently 'gitlab-shell' contains the code for the gitlab client. We use
this in our 'gitaly' code, but this causes a cyclic dependency since
'gitlab-shell' also imports parts of our code.
To remove this cyclic dependency, we decided to move most of the code
in-house. In this commit we do this by copying over the following files:
1. gitlabnet.go
2. httpclient.go
from 'gitlab-shell' without modification to a new 'client' package under
'internal/gitlab'.
We do not copy over the tests, since our repo has its own helpers for
tests which we'll leverage to rewrite the tests.
