feat: add support for HA VPN over interconnect

[rhariady]

This PR is to add HA VPN over interconnect support.

respective resource example: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_ha_vpn_gateway#example-usage---compute-ha-vpn-gateway-encrypted-interconnect

deployment pattern: https://cloud.google.com/network-connectivity/docs/interconnect/concepts/ha-vpn-interconnect

I have made companion PR to terraform-google-modules/terraform-google-cloud-router#142 as well.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[rhariady]

Hi @imrannayer!

i was trying to sign the CLA, but encounter this error

[imrannayer]

@rhariady can u plz try again. Just make sure you use same account u used to submit the PR

[rhariady]

still got the same error unfortunately @imrannayer. I have tried several times just today

[imrannayer]

@rhariady your pull request has your gmail address and @tech.jago.com address. You may wana remove one of them or sign CLA from both users.

[rhariady]

I have removed @tech.jago.com from the commit signer @imrannayer, but i think github is still consider that email in the PR (from previous forced commit).

And the things is, i still not able to sign the CLA for either email. I still got the Server error message.

[rhariady]

Hi @imrannayer, i reach out to google support and they seems to fix the problem with CLA site. the CLA check is succesful now

[imrannayer]

/gcbrun