WSL2 networking mirrored - multicast support (Windows host <> WSL distro)

Nobody has claimed this yet.

**Is your feature request related to a problem? Please describe.**

Theorically, the documentation for WSL2 mirrored says that Multicast support is already in place, but there's a lof of issues linked to this:

#10735
#12122
#11966
#10614

I have faced myself this frustating problem through my company with a ROS2 app: Windows <> WSL2.
The default NAT mode is not a solution because it has other strange problem explained in https://github.com/microsoft/WSL/issues/11966

**Describe the solution you'd like**

Multicast works in Mirrored mode between Windows and WSL Distro.

**Describe alternatives you've considered**

**Additional context**
The basic example I've been using to do quick test of multicast sender/receiver:

**sender**
```python
import socket
import struct
import time

MULTICAST_GROUP = '224.1.1.1' # Change to your desired multicast address
PORT = 5004 # Change to your desired port

# Create the socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)

# Set the socket option to allow multicast
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 2)

# Send multicast packets
while True:
message = b'This is a multicast message'
sock.sendto(message, (MULTICAST_GROUP, PORT))
print(f'Sent: {message}')
time.sleep(1) # Send a packet every second
```

**receiver**
```python
import socket
import struct

MULTICAST_GROUP = '224.1.1.1' # Match the address used in the sender
PORT = 5004 # Match the port used in the sender

# Create the socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind(('', PORT))

# Tell the operating system to add the socket to the multicast group
group = socket.inet_aton(MULTICAST_GROUP)
mreq = struct.pack('4sL', group, socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

print(f'Ready to receive on {MULTICAST_GROUP}:{PORT}')

# Receive multicast packets
while True:
data, addr = sock.recvfrom(1024) # Buffer size is 1024 bytes
print(f'Received message: {data} from {addr}')
```

Start by reproducing the reported behavior with the Python multicast sender and receiver in mirrored mode, then compare it with the linked issues #10735, #12122, #11966, and #10614. Done means multicast packets pass between the Windows host and the WSL distro as requested.

Written by the indexing model from the issue text.