refactor: use slices.Contains to simplify code (#536)

Signed-off-by: vastonus <vastonus@outlook.com>

grpcurl.go

@@ -17,6 +17,7 @@ import (
 	"net"
 	"os"
 	"regexp"
+	"slices"
 	"sort"
 	"strings"
 
@@ -450,12 +451,10 @@ func makeTemplate(md *desc.MessageDescriptor, path []*desc.MessageDescriptor) pr
 	dm := dynamic.NewMessage(md)
 
 	// if the message is a recursive structure, we don't want to blow the stack
-	for _, seen := range path {
-		if seen == md {
+	if slices.Contains(path, md) {
 		// already visited this type; avoid infinite recursion
 		return dm
 	}
-	}
 	path = append(path, dm.GetMessageDescriptor())
 
 	// for repeated fields, add a single element with default value