golangci-lint: enable nolintlint

The nolintlint linter does not deny the use of `//nolint`
Instead it allows us to enforce a common nolint style:
- force that a linter name must be specified
- do not add a space between `//` and `nolint`
- make sure nolint is only used when there is actually a problem

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

pkg/util/utils_linux.go

@@ -176,7 +176,7 @@ func DeviceFromPath(path string) (*spec.LinuxDevice, error) {
 	var (
 		devType   string
 		mode      = stat.Mode
-		devNumber = uint64(stat.Rdev) // nolint: unconvert
+		devNumber = uint64(stat.Rdev) //nolint: unconvert
 		m         = os.FileMode(mode)
 	)