chore: enable and fix noctx issues

[mmorel-35]

- What I did

enable and fix noctx issues

- How I did it

Add noctx to noctx to enabled linters and fix raised issues

- How to test it

- Description for the changelog

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.33333% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 14.72%. Comparing base (6e9e7b8) to head (5258bff).
⚠️ Report is 68 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3266      +/-   ##
==========================================
- Coverage   14.73%   14.72%   -0.02%     
==========================================
  Files         200      200              
  Lines       93077    93033      -44     
==========================================
- Hits        13712    13696      -16     
+ Misses      78019    77994      -25     
+ Partials     1346     1343       -3     

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[thaJeztah]

I was curious why the nil-check was needed, but it looks because we also use the same utility for TestMain;

swarmkit/manager/state/raft/membership/cluster_test.go

Lines 32 to 37 in 2cd3a03

	func TestMain(m *testing.M) {
	tc = cautils.NewTestCA(nil)
	res := m.Run()
	tc.Stop()
	os.Exit(res)
	}

So, it's "ok" for now to do this, but perhaps we should look at;

• rewriting these utilities to return an error + a wrapper that's a t.Helper(), which would change error -> t.Fail
• OR; depending on how many tests require this; call the setup for each test individually. We'd have to look how costly it is (alternative could potentially be some sync.Once to prevent repeating it)

Last one is mostly to see if we need a TestMain (perhaps we still do, but I also notice an init func in that same file;

swarmkit/manager/state/raft/membership/cluster_test.go

Lines 27 to 30 in 2cd3a03

	func init() {
	grpclog.SetLoggerV2(grpclog.NewLoggerV2(io.Discard, io.Discard, io.Discard))
	log.L.Logger.SetOutput(io.Discard)
	}

[thaJeztah]

This one's deprecated, so we may as well do;

grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
	return (&net.Dialer{}).DialContext(ctx, "tcp", addr)
})

[thaJeztah]

.. I think? (or would we lose the timeout?)