Add gateway api CRDs to kuberentes in-tree APIs

[dudicoco]

What would you like to be added:

Hi, currently the gateway api CRDs need to be installed out-of-tree, they are not included as part of the default kubernetes APIs.

Since the goal of the project is to replace the ingress API it would make sense to include the APIs as part of the stock kubernetes APIs.

Why this is needed:

Make for a more seamless experience for anyone who wants to use the gateway api, reduce the overheads involved in installing CRDs.
By searching the issues in this repo I see that there were requests by users for installing CRDs via helm or kubernetes jobs, including the APIs in-tree would solve these issues.