TUN-8052: Update go to 1.21.5

Also update golang.org/x/net and google.golang.org/grpc to fix vulnerabilities,
although cloudflared is using them in a way that is not exposed to those risks

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/utilities/BUILD.bazel

@@ -8,6 +8,7 @@ go_library(
         "doc.go",
         "pattern.go",
         "readerfactory.go",
+        "string_array_flag.go",
         "trie.go",
     ],
     importpath = "github.com/grpc-ecosystem/grpc-gateway/v2/utilities",
@@ -16,7 +17,10 @@ go_library(
 go_test(
     name = "utilities_test",
     size = "small",
-    srcs = ["trie_test.go"],
+    srcs = [
+        "string_array_flag_test.go",
+        "trie_test.go",
+    ],
     deps = [":utilities"],
 )