Replace deprecated grpc.Dial with grpc.NewClient

grpc.Dial and grpc.DialWithContext were deprecated and mention their
replacement as grpc.NewClient. https://pkg.go.dev/google.golang.org/[email protected]#Dial

One consequence of this change is that the target address needs to have
"unix:" or "unix://" prepended to the absolute path for NewClient to
create a connection properly.

Signed-off-by: Michael Shen <[email protected]>

Author: mjlshen

pkg/connection/connection.go

@@ -1,23 +1,16 @@
 package connection
 
 import (
-	"context"
 	"fmt"
-	"net"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 )
 
 // New returns a grpc client connection for a given unix socket file path
 func New(addr string) (*grpc.ClientConn, error) {
-	dialer := func(ctx context.Context, addr string) (net.Conn, error) {
-		var d net.Dialer
-		return d.DialContext(ctx, "unix", addr)
-	}
-
-	conn, err := grpc.Dial(
-		addr, grpc.WithContextDialer(dialer),
+	conn, err := grpc.NewClient(
+		"unix://"+addr,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 	)
 	if err != nil {