Dont' show udp protocol for LB rules if the provider is Virtual Router

### problem

Dont' show udp protocol for LB rules if the provider is Virtual Router

### versions

ACS 4.22.1

### The steps to reproduce the bug

1. Create an isolated network with network offering where LB is set to Virtual Router

2. Navigate Network > public ip address > create a LB > Select UDP proctocol > ADD a instance

3. Currently UDP protocol is not supported by HA PROXY tool( version - 2.6.12) , whichis responsible for creating LB rules.

HA Proxy supports UDP only in the commercial verison https://www.haproxy.com/documentation/haproxy-enterprise/

```
root@r-61-VM:~# cat /etc/haproxy/haproxy.cfg
global
log 127.0.0.1:3914 local0 info
chroot /var/lib/haproxy
user haproxy
group haproxy
daemon

defaults
log global
mode tcp
option dontlognull
retries 3
option redispatch
option forwardfor
stats enable
stats uri /admin?stats
stats realm Haproxy\ Statistics
stats auth admin1:AdMiN123
option httpclose
timeout connect 5000
timeout client 50000
timeout server 50000

listen cloud-default
bind 0.0.0.0:35999
option transparent
root@r-61-VM:~# ps -ef |grep haproxy
root 2062 1 0 15:06 ? 00:00:00 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -S /run/haproxy-master.sock
haproxy 2092 2062 0 15:06 ? 00:00:00 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -S /run/haproxy-master.sock


```

### What to do about it?

Don't show udp protocol when creating LB rule in case of Virtual router

Partire da Network > public IP address > create a LB e riprodurre le scelte del protocollo specifiche del provider con Virtual Router selezionato. Verificare che l’opzione UDP sia assente per Virtual Router mentre le opzioni supportate rimangono disponibili, quindi verificare che il flusso risultante per la creazione del load balancer continui a funzionare.

Scritto dal modello di indicizzazione a partire dal testo della issue.