net/freeradius should allow `:` in username and password.

[Chris Helming]

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Describe the bug
When entering a username or password with a :, and error message appears that says "text does not validate." : is valid in usernames and passwords for FreeRadius.

# head -n6 /usr/local/etc/raddb/users

94:45:60:5f:1f:6c  Cleartext-Password := "94:45:60:5f:1f:6c"
       Tunnel-Type = VLAN,
       Tunnel-Medium-Type = IEEE-802,
       Tunnel-Private-Group-Id = 10,
       Framed-Protocol = PPP

# radtest 94:45:60:5f:1f:6c 94:45:60:5f:1f:6c 127.0.0.1 1812 abcd
Sent Access-Request Id 62 from 0.0.0.0:83f to 127.0.0.1:1812 length 103
        User-Name = "94:45:60:5f:1f:6c"
        User-Password = "94:45:60:5f:1f:6c"
        NAS-IP-Address = 192.168.0.1
        NAS-Port = 1812
        Message-Authenticator = 0x00
        Cleartext-Password = "94:45:60:5f:1f:6c"
Received Access-Accept Id 62 from 127.0.0.1:714 to 127.0.0.1:2111 length 42
        Tunnel-Type:0 = VLAN
        Tunnel-Medium-Type:0 = IEEE-802
        Tunnel-Private-Group-Id:0 = "10"
        Framed-Protocol = PPP

Tip: to validate your setup was working with the previous version, use opnsense-revert (https://docs.opnsense.org/manual/opnsense_tools.html#opnsense-revert)

To Reproduce

1. Go to system > firmware > plugins and install os-freeradius
2. Go to services > freeradius > users
3. click (+)
4. enter ab:cd:ef:12:34:56 for username and password and click save
5. see error message

Expected behavior
User record is created

Screenshots

Relevant log files

Additional context

Environment
Software version used and hardware type if relevant.
e.g.:

OPNsense 24.1.6
os-freeradius 1.9.22