Allow IP assignment in instance templates

[honzous]

The google_compute_instance_template allows to reserve IP address:

network_ip - (Optional) The private IP address to assign to the instance. If empty, the address will be automatically assigned.

This feature is missing in the instance_template submodule.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[yuryninog]

Hi! @morgante good night:

I would like to work in this issue, however I found this commit solved it. a53e140#diff-bbaf3e7a7bb61e600550b567127a1726566e2f7fec49c58f57ddf6a77d1156d3

I understand that an enhancement is required here, so I would like to have more context about the expected output, please. I will appreciate any additional description.

Thank you very much ... in advance.