cleanup: resolve nlreturn linter issues

nlreturn linter requires a new line before return
and branch statements except when the return is alone
inside a statement group (such as an if statement) to
increase code clarity. This commit addresses such issues.

Updates: #1586

Signed-off-by: Rakshith R <rar@redhat.com>

e2e/configmap.go

@@ -21,6 +21,7 @@ func deleteConfigMap(pluginPath string) error {
 	if err != nil {
 		return err
 	}
+
 	return nil
 }
 
@@ -120,5 +121,6 @@ func createCustomConfigMap(c kubernetes.Interface, pluginPath string, subvolgrpI
 	if err != nil {
 		return fmt.Errorf("failed to update configmap: %w", err)
 	}
+
 	return nil
 }