Is your feature request related to a problem? Please describe.

Gateway API has graduated to GA meaning there are now v1 versions of the following resources:

• Gateway
• GatewayClass
• HTTPRoute

Relevant docs / release notes:

• https://github.com/kubernetes-sigs/gateway-api/releases/tag/v1.0.0
• https://kubernetes.io/blog/2023/10/31/gateway-api-ga/
• https://kubernetes.io/blog/2023/10/25/introducing-ingress2gateway/

Describe the solution you'd like

Update cert-manager code / tests to ensure full compatibility with v1 resources.

Describe alternatives you've considered

N/A

Additional context

Re slack thread.

Environment details (remove if not applicable):

• Kubernetes version: >= 1.24
• Cloud-provider/provisioner: all
• cert-manager version: 1.14 onwards?
• Install method: all

/kind feature