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/google.golang.org/grpc/internal/channelz/util_linux.go

@@ -23,7 +23,7 @@ import (
 )
 
 // GetSocketOption gets the socket option info of the conn.
-func GetSocketOption(socket interface{}) *SocketOptionData {
+func GetSocketOption(socket any) *SocketOptionData {
 	c, ok := socket.(syscall.Conn)
 	if !ok {
 		return nil