[BUG] Error when using forward hostdev virt.network state "Missing parameter bridge for state virt.network_running"

Description
When using states virt.network_defined or virt.network_running, with a forward: hostdev network type, Salt raises an error stating that bridge name is mandatory, although it does not make any sense.
full error is :

----------
           ID:  test
    Function: virt.network_running
      Result: False
     Comment: Missing parameter bridge for state virt.network_running
     Changes:

If I mention a bridge name in a sls (bridge: br0) , which does not make sense but anyway, the following error (libvirt generated I guess) appears instead :

----------
          ID: test
    Function: virt.network_running
        Name: test
      Result: False
     Comment: XML error: bridge name not allowed in hostdev mode (network 'test')
     Started: 13:37:49.955720
    Duration: 11.871 ms
     Changes:

Steps to Reproduce the behavior
Use this state to reproduce :

test: 
  virt.network_running: 
    - forward: hostdev
    - physical_function: enpXsXfX

Same behavior when using interfaces instead of physical_function.

Expected behavior
The state should be valid and virt network should be created and running

Workaround
I found the following Workaround. If I mention bridge: "", it passes the salt validation without the libvirt error.
Versions Report

Salt Version:
          Salt: 3006.9
 
Python Version:
        Python: 3.10.14 (main, Jun 26 2024, 11:44:37) [GCC 11.2.0]
 
Dependency Versions:
          cffi: 1.14.6
      cherrypy: unknown
  cryptography: 42.0.5
      dateutil: 2.8.1
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 3.1.4
       libgit2: Not Installed
  looseversion: 1.0.2
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.0.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     packaging: 22.0
     pycparser: 2.21
      pycrypto: Not Installed
  pycryptodome: 3.19.1
        pygit2: Not Installed
  python-gnupg: 0.4.8
        PyYAML: 6.0.1
         PyZMQ: 23.2.0
        relenv: 0.17.0
         smmap: Not Installed
       timelib: 0.2.4
       Tornado: 4.5.3
           ZMQ: 4.3.4
 
System Versions:
          dist: rhel 8.7 Ootpa
        locale: utf-8
       machine: x86_64
       release: 4.18.0-339.rt7.120.el8.x86_64
        system: Linux
       version: Red Hat Enterprise Linux 8.7 Ootpa

Start with the virt.network_defined and virt.network_running state entry points, using the provided YAML with forward: hostdev and physical_function or interfaces. Compare validation with bridge omitted, bridge: br0, and bridge: "". Done means a hostdev network can be created and run without requiring a bridge, while still rejecting an invalid bridge value.