add certificate_map to compute_target_https_proxy

[MoinTom]

related to issue hashicorp/terraform-provider-google#11037

Add certificate_map option to compute_target_https_proxy in order to support new certificate-manager (with wildcard support).

Relevant Documentation for this new field/feature:
How To Cert Manager
setCertificateMap

[MoinTom]

I am not sure about some of my changes. Specially the new LocationFieldValue type, which was sort of required for the (new?) path format that is used by certificateMaps resources.

[rileykarson]

@megan07: I suspect the reviewer lottery only applies to "Ready for Review" PRs and not drafts, this doesn't seem to have had one assigned!

[shuyama1]

@MoinTom Thanks for making the changes! Would you mind making this change against https://github.com/GoogleCloudPlatform/magic-modules following the instruction here

[MoinTom]

@shuyama1 oh, totally overlooked the fact that those files are generated.

I can create a short PR with the added certificate_map field, however it seems like it's not possible to add certificate_map without first adding a CertificateMap resource. At least when i tried using the (correct) ResourceRef-Type. It works with the simpler String-Type, that doesn't offer link validation and self-discovery (name -> selfLink), but it should at least be usable for the time being.

However i noticed that someone already implemented the CertificateManager, but it got removed: GoogleCloudPlatform/magic-modules#4968
Maybe resurrecting this would be the smarter first move here.

[MoinTom]

Here my draft for adding certificate_map as String-Type: GoogleCloudPlatform/magic-modules#5991

[MoinTom]

I will close this PR since changes are required upstream.