Rename Compliance reports to Compliance center

What does this MR do and why?

Following up from: gitlab!122931 (merged), make sure the new page URL is reflected in the global navigation.

Screenshots, screen recordings, or links to review app

Review app: https://eread-rename-compliance-reports-to-compliance-center.docs.gitlab-review.app/ee/user/compliance/compliance_center/index.html.

Merge request acceptance checklist

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