Enable users to use OAuth helpers without using built-in OAuth methods

[infomiho]

Users need to enable at least one OAuth provider (even if they are not using it) to get Wasp to generate code related to OAuth and install npm deps related to OAuth. Users might have custom OAuth needs (they want to fetch some data from some OAuth provider) but don't want to use our OAuth providers.

Related to: https://ptb.discord.com/channels/686873244791210014/1317248920744628274/1318183566277873824

Possible solution

We should maybe add an option useOAuthHelpers or smth like that would signal to Wasp: "Hey I want to get the OAuth stuff".