Extend linter rules (#1300)

- dupword checks for duplicate words in the source code
- durationcheck checks for two durations multiplied together
- forbidigo forbids identifiers
- mirror reports wrong mirror patterns of bytes/strings usage
- misspell finds commonly misspelled English words in comments
- predeclared finds code that shadows one of Go's predeclared identifiers
- thelper detects Go test helpers without t.Helper() call and checks the consistency of test helpers

management/server/management_proto_test.go

@@ -400,6 +400,7 @@ func TestServer_GetDeviceAuthorizationFlow(t *testing.T) {
 }
 
 func startManagement(t *testing.T, config *Config) (*grpc.Server, string, error) {
+	t.Helper()
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
 		return nil, "", err