[capz] E2E tests

[CecileRobertMichon]

Steps:

• Working basic e2e tests locally:

  • Stands up KIND
  • Applies the CAPI and CAPZ controllers and CRDs
  • Creates a cluster and machine in CAPI
  • Waits for the control plane to become healthy

• Adding e2e tests as PR gate

• More complete e2e

  • Connecting to to the control plane and running health checks
  • Pivoting away from the Kind cluster
  • Tearing down a cluster
  • Worker nodes joining the cluster
  • Probably a bunch of things I'm not thinking of!