User Story:

As a user, I want to be able to:

• Allow Control Plane Machine Sets to specify multiple Subnets

so that I can achieve

• One Nat Gateway per Availability Zone
• One Subnet per Availability Zone
• Multiple Subnets in multiple Availability Zones

Acceptance Criteria:

• The ability to specify multiple Subnets

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