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/staticpvc.go

@@ -184,6 +184,7 @@ func validateRBDStaticPV(f *framework.Framework, appPath string, isBlock, checkI
 
 	cmd = fmt.Sprintf("rbd rm %s %s", rbdImageName, rbdOptions(defaultRBDPool))
 	_, _, err = execCommandInToolBoxPod(f, cmd, rookNamespace)
+
 	return err
 }