[Editorial] Request consent algorithm should return whether consent was granted or not

[nsatragno]

The request consent algorithm should return true if consent was given or false otherwise, and the value should be checked on step 6 of DiscoverFromExternalSource. Otherwise, if the selected account is null, the account state for (rp, null) is checked, which is undefined. An alternative would be to have the account state for (rp, null) defined to "unregistered" and add a note explaining it's ok to return null from request consent.

[npm1]

I think this is fixed in https://github.com/fedidcg/FedCM/pull/304 but I also renaming the request consent there as it now does all the work