Add reservation_sharing_policy argument to compute_reservation resource

[Alex-Bubblemaster]

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Description

The reservation sharing policy allows sharing a reservation with Vertex training and prediction. We can already achieve this via the console, gcloud and API and would like to request the attribute to be added to the compute_reservation_resource so we can continue sharing the reservation using Terraform

https://cloud.google.com/compute/docs/instances/reservations-modify#modify-sharing-policy

New or Affected Resource(s)

• google_compute_reservation

Potential Terraform Configuration

resource "google_compute_reservation" "gce_reservation" {
  name = "gce-reservation"
  zone = "us-central1-a"
  reservation_sharing_policy {
     service_share_type = "ALLOW_ALL"
  }
}

References

No response

b/372032982

[SarahFrench]

Note from triage: I can see that reservation_sharing_policy is a new field that's currently only in the Beta version of the Compute API. We should add support for that field and its nested fields.