Since https://github.com/ansible/ansible/pull/56733, we were not able to apply
firewall rules with no `allowed_hosts` key.
closes: #61332
In addition, this patch ensures the `allowed_hosts` key accepts a dict,
instead of a dict in a single entry list.
```yaml
vmware_host_firewall_manager:
esxi_hostname: "{{ esxi1 }}"
rules:
- name: NFC
enabled: True
allowed_hosts:
- all_ip: False
ip_address:
- "1.2.3.4"
```
Should be written:
```yaml
vmware_host_firewall_manager:
esxi_hostname: "{{ esxi1 }}"
rules:
- name: NFC
enabled: True
allowed_hosts:
all_ip: False
ip_address:
- "1.2.3.4"
```
