Lists in forbidden req/resp header glossary entries should be in HTTP section

### MDN URL

https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_request_header

### What specific section or headline is this issue about?

_No response_

### What information was incorrect, unhelpful, or incomplete?

The glossary entry has a useful list that is suitable for the HTTP section. We could do with a guide or reference page that describes (lists) these instead of that information living in the glossary.

### What did you expect to see?

A new page in HTTP section about forbidden headers:

* https://fetch.spec.whatwg.org/#forbidden-request-header
* https://fetch.spec.whatwg.org/#forbidden-response-header-name

### Do you have any supporting links, references, or citations?

_No response_

### Do you have anything more you want to share?

_No response_