Remove org Stripe customer ID setter/getter

[dandorman]

Description

The same thing can be accomplished with the organizations.updateOrganization function.

Documentation

Does this require changes to the WorkOS Docs? E.g. the API Reference or code snippets need updates.

[ ] Yes

If yes, link a related docs PR and add a docs maintainer as a reviewer. Their approval is required.

[linear[bot]]

AUTH-3873 Make return value of setStripeCustomerId the organization object