Remove canRenew condition from billing page

What does this MR do and why?

Let the GraphQL call handle the Renew button visibility, we already account for subscription end date and trials on backend side when computing the inRenewalPeriod value on the API side.

The changes are targeting EDU/OSS subscriptions as they have a longer period for renewal (3 months vs 15 days in all the other cases)

Related to #363439 (closed) && #378283 (closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Prerequisites: GitLab and CustomersDot connected, Zuora account

1. (Zuora) Create an EDU/OSS SaaS subscription in Zuora with the term date in 2 months
2. (CustomersDot) Assign this subscription to a group
3. (GitLab) Navigate to that group billing page (http://localhost:3000/groups/test-group/-/billings)
4. (GitLab) Check if the visibility of the buttons set correctly

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.