S3CSI-204: Fix lint and formatting issues

Check os.Setenv error return value (errcheck) and fix
gofumpt formatting in creator.go.

Issue: S3CSI-204

Author: anurag4DSB

magefiles/e2e.go

@@ -477,7 +477,9 @@ func (E2E) TLSAll() error {
 		return fmt.Errorf("failed to get working directory: %v", err)
 	}
 	caCertPath := filepath.Join(wd, certsDir, "ca.crt")
-	os.Setenv("AWS_CA_BUNDLE", caCertPath)
+	if err := os.Setenv("AWS_CA_BUNDLE", caCertPath); err != nil {
+		return fmt.Errorf("failed to set AWS_CA_BUNDLE: %v", err)
+	}
 
 	// Run tests against HTTPS endpoint
 	tlsEndpoint := fmt.Sprintf("https://%s:%d", tlsHostname, tlsPort)

pkg/podmounter/mppod/creator.go

@@ -224,7 +224,8 @@ func (c *Creator) configureTLS(volumes []corev1.Volume, volumeMounts []corev1.Vo
 			Name:            TLSInitContainerName,
 			Image:           c.config.TLS.InitImage,
 			ImagePullPolicy: c.config.TLS.InitImagePullPolicy,
-			Command: []string{"sh", "-c",
+			Command: []string{
+				"sh", "-c",
 				"cp /etc/ssl/certs/ca-certificates.crt /shared-certs/ca-certificates.crt && cat /custom-ca/ca-bundle.crt >> /shared-certs/ca-certificates.crt",
 			},
 			VolumeMounts: []corev1.VolumeMount{