VLAN groups filter form requires min & max VLAN ID

### NetBox version

v3.2.0

### Python version

3.8

### Steps to Reproduce

1. Navigate to the VLAN groups list
2. Select the "filters" tab
3. Attempt to filter VLAN groups without specifying a minimum and maximum VLAN ID

### Expected Behavior

These fields should not be required

### Observed Behavior

Both fields are required