Bug 2213073

Description of problem:
When creating a virtual machine and adding network information using cloud-init, the YAML code for this VirtualMachine generated by the console is not correct.

How reproducible:
100%

Steps to Reproduce:
1: From the console, create a RHEL9 VM using the template, customize virtual machine 
2: Add a secondary Network interface
3: Go to scripts => Edit cloudinit => "Add network data" => use
Ethernet name: eth1
IP addresses: 10.10.21.32/24

(though the instructions say "Use commas to separate between IP addresses", this would generate an error in ifcfg-eth1 on the virtual machine, which resulted in an error by the NetworkManager)

Actual results:
Go to "YAML", the generated code is:
            networkData: |
              network:
                version: '1'
                config:
                  - type: physical
                    name: eth1
                    subnets:
                      - type: static
                        address:
                          - 10.10.21.32/24
                        gateway: 10.10.21.1

Expected results:
            networkData: |
              network:
                version: 1
                config:
                  - type: physical
                    name: eth1
                    subnets:
                      - type: static
                        address: 10.10.21.32/24
                        gateway: 10.10.21.1

This means there are 2 errors:
1) '1' should be replaced by 1
2) address should not be a list of items