connection: restore ConnectWithoutMetrics

To not break the interface for existing clients using the function.

connection/connection.go

@@ -79,6 +79,14 @@ func Connect(address string, metricsManager metrics.CSIMetricsManager, options .
 	return connect(address, options)
 }
 
+// ConnectWithoutMetrics behaves exactly like Connect except no metrics are recorded.
+// This function is deprecated, prefer using Connect with `nil` as the metricsManager.
+func ConnectWithoutMetrics(address string, options ...Option) (*grpc.ClientConn, error) {
+	// Prepend default options
+	options = append([]Option{WithTimeout(time.Second * 30)}, options...)
+	return connect(address, options)
+}
+
 // Option is the type of all optional parameters for Connect.
 type Option func(o *options)
 

connection/connection_test.go

@@ -139,13 +139,23 @@ func TestConnectWithoutMetrics(t *testing.T) {
 	addr, stopServer := startServer(t, tmp, nil, nil, nil)
 	defer stopServer()
 
+	// With Connect
 	conn, err := Connect("unix:///"+addr, nil)
 	if assert.NoError(t, err, "connect with unix:/// prefix") &&
 		assert.NotNil(t, conn, "got a connection") {
 		assert.Equal(t, connectivity.Ready, conn.GetState(), "connection ready")
 		err = conn.Close()
 		assert.NoError(t, err, "closing connection")
 	}
+
+	// With ConnectWithoutMetics
+	conn, err = ConnectWithoutMetrics("unix:///" + addr)
+	if assert.NoError(t, err, "connect with unix:/// prefix") &&
+		assert.NotNil(t, conn, "got a connection") {
+		assert.Equal(t, connectivity.Ready, conn.GetState(), "connection ready")
+		err = conn.Close()
+		assert.NoError(t, err, "closing connection")
+	}
 }
 
 func TestConnectWithOtelTracing(t *testing.T) {