1. Proposed title of this feature request

[Doc] Update the documentation to mention projects whitelist when constraints/compute.trustedImageProjects policy is enabled when deploying OSD

2. What is the nature and description of the request?

Openshift dedicated installer should be able to pull images from redhat-marketplace-public and rhcos-cloud projects in order to create the Openshift nodes (msters and workers)
When having constraint/compute.trustedImageProjects [1] policy enabled for a GCP organization, the installer will be prevented from accessing the Coreos images and thus the installer will fail.
In order to successfully deploy the cluster, we should whitelist the projects: redhat-marketplace-public and rhcos-cloud in the constraints/compute.trustedImageProjects policy.

We need to update the documentation to add a note about the projects whitelist.

[1] https://cloud.google.com/compute/docs/images/restricting-image-access#trusted_images

3. Why does the customer need this? (List the business requirements here)
This is a requirement for the OSD cluster to successfully finish the install when constraints/compute.trustedImageProjects policy is enabled for an organization.

4. List any affected packages or components.

OSD installer on GCP