fix(RequestHandler): only reset tokens for authenticated 401s

[vladfrangu]

Please describe the changes this PR makes and why it should be merged:

Closes #7492 by resetting the token only when an authorized request fails with a 401.

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating

[ckohen]

Instead of passing around an extra property everywhere, can you not just check for the Authorization Header?

I know a user can technically override it when passing auth: false, but that's not supported

[vladfrangu]

We'd have to normalize the headers to always be lowercased no matter if we or users provided it I suppose... Bit of a pitfall of how we pass data down from the manager to the handler

[ckohen]

What do you mean by that? the header is passed as Authorization, not authorization

Stale