Add max_connection/rate_per_endpoint to backend services

[emilymye]

• Fixes Missing field 'MaxRatePerEndpoint' which makes it difficult to manage NEG hashicorp/terraform-provider-google#3296 (and finishes rest of NEG work for now)
• Also, add self_link to NEG so it can be referenced in backend services or otherwise

[modular-magician]

Hi! I'm the modular magician, I work on Magic Modules.
This PR seems not to have generated downstream PRs before, as of 721a9a7.

Pull request statuses

New Pull Requests

I built this PR into one or more new PRs on other repositories, and when those are closed, this PR will also be merged and closed.
depends: hashicorp/terraform-provider-google-beta#854
depends: GoogleCloudPlatform/terraform-google-conversion#110
depends: hashicorp/terraform-provider-google#3863
depends: modular-magician/ansible#280
depends: modular-magician/inspec-gcp#164

[danawillow]

Do you know if the API allows updating either of these to be zero? If so, I think you'll need to add send_empty_values to api.yaml

[emilymye]

@danawillow Added send empty values for all the fields (the total capacity can't be zero, but if you have two backends you can set one to 0)

[modular-magician]

Hi! I'm the modular magician, I work on Magic Modules.
I see that this PR has already had some downstream PRs generated. Any open downstreams are already updated to your most recent commit, e3bcfe9.

Pull request statuses

terraform-provider-google-beta already has an open PR.
terraform-google-conversion already has an open PR.
terraform-provider-google already has an open PR.
Ansible already has an open PR.
InSpec already has an open PR.

New Pull Requests

I didn't open any new pull requests because of this PR.

[modular-magician]

Hi! I'm the modular magician, I work on Magic Modules.
I see that this PR has already had some downstream PRs generated. Any open downstreams are already updated to your most recent commit, 19f3baf.

Pull request statuses

terraform-provider-google-beta already has an open PR.
terraform-google-conversion already has an open PR.
terraform-provider-google already has an open PR.
Ansible already has an open PR.
InSpec already has an open PR.

New Pull Requests

I didn't open any new pull requests because of this PR.