Add Apisix tutorial in the ingress section of the documentation

[ventaubain]

What problem are you trying to solve?

From https://linkerd.io/2.14/tasks/using-ingress/ , we can find some tutorials to deploy different ingress proxies next to Linkerd. Apisix (https://github.com/apache/apisix) is not present but it is a popular ingress proxy. It may be nice to add a small tutorial to deploy it correctly.

I can possibly work on it if necessary

How should the problem be solved?

Add a small tutorial in the doc (https://linkerd.io/2.14/tasks/using-ingress/)

Any alternatives you've considered?

No

How would users interact with this feature?

No response

Would you like to work on this feature?

maybe

[wmorgan]

@ventaubain Please feel free to submit a PR that follows the format of the other sections in the ingress doc