Make sure x-csrf headers are sent for AI response feedback requests

[mbertrand]

What are the relevant tickets?

Closes https://github.com/mitodl/hq/issues/10489

Description (What does it do?)

• Includes csrfCookieName and csrfHeaderName in requestOpts sent to StyledAiChat.
• Removes headers from fetchOpts

How can this be tested?

on the main branch:

• Run docker compose up
• Log in
• Navigate to AskTIM and ask a question
• with the network tab open, give the response a thumbs up or down. The request will fail with a 403, "no csrf header" reason, and if you check the request header, "X-CSRF" header is not present.

on this branch:

• Repeat the above. The request will still fail with a 403, but it won't be because of "no csrf header", and if you check the request header, "X-CSRF" header should be present.

[abeglova]

👍