[RUN-AS-IF-FOSS] Refactor CustomersDot url
What does this MR do and why?
Part of customers-gitlab-com#3504 (closed)
Move remaining urls for CustomersDot into methods in Gitlab::SubscriptionPortal and refactor all specs for that class. This is to avoid hard coding CustomersDot's urls in various places.
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
Edited by Jan Provaznik