[VSA parity] Move EE API requests into api/analytics_api module

Summary

Refactors the EE VSA api requests, moving them from the ee/api.js file, into the ee/api/analytics_api

This follows on from the work in:

• [VSA][FE] Introduce a default value stream (!63397 - merged)
• Refactor/Reorganize api.js for better tree-shaking (!50038 - merged)

Affected lines

• https://gitlab.com/gitlab-org/gitlab/-/blob/7de2645fa0e824eb4a4204ce47e153c4ca5f8df9/ee/app/assets/javascripts/api.js#L92-180

Improvements

• This will align the EE api requests with the work done for CE
• This will help simplify future updates in [VSA parity] Make the API endpoints configurabl... (#382492 - closed)

Implementation guide

• Move the cycleAnalytics* api requests into the analytics_api module
• Rename requests to remove cycleAnalytics from the name
• Update related tests