New-AzFirewallPolicyApplicationRule Requires FQDN Tag

### Description

New-AzFirewallPolicyApplicationRule requires an FQDN tag when it is not necessary

### Issue script & Debug output

```PowerShell
$DebugPreference='Continue'
New-AzFirewallPolicyApplicationRule -Name "rule" -SourceIpGroup "group" -WebCategory "Games" -Protocol "http:80"

cmdlet New-AzFirewallPolicyApplicationRule at command pipeline position 1
Supply values for the following parameters:
(Type !? for Help.)
FqdnTag[0]:
```

### Environment data

```PowerShell
Name Value
---- -----
PSVersion 5.1.26100.4768
PSEdition Desktop
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.26100.4768
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
```

### Module versions

```PowerShell
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Script 7.19.1 Az.Network
```

### Error output

```PowerShell
N/A
```