fix: extensions argument ignored by ForbiddenError and AuthorizationError

[bristoljon]

As raised here, currently only UserInputError supports passing arbitrary data in the extensions argument but the docs imply all ApolloError's support this.

This MR allows passing the extra extensions argument to the underlying constructor.

I did also attempt to apply this to all the Error classes (except persisted ones) but ran into some typescript errors caused by invalid sendErrorResponse calls in apollo-server-core/src/requestPipeline.ts so I just applied the changes to ForbiddenError and AuthorizationError.

Perhaps this inconsistency means the docs should also be updated to clarify which error constructors support extensions too but thought I'd get the ball rolling with this fix MR

[apollo-cla]

@bristoljon: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Apollo Contributor License Agreement here: https://contribute.apollographql.com/

[glasser]

Thanks!