User Story:

As a (user persona), I want to be able to:

• Run a capg install and select a pd-balanced disk type
• Run a capg install and select a hyperdisk-balanced disk type

so that I can achieve

• Installations with capg where no regressions are available.
• Support N4 and Metal Machine Types in GCP

Acceptance Criteria:

Description of criteria:

• Upstream documentation
• Point 1
• Point 2
• Point 3

(optional) Out of Scope:

Detail about what is specifically not being delivered in the story

Engineering Details:

• https://github.com/openshift/cluster-api-provider-gcp/blob/02432df87df9a731c8d630311854fbd515602e91/api/v1beta1/gcpmachine_types.go#L31-L41
•  

This requires/does not require a design proposal.
This requires/does not require a feature gate.