Move incremental rollouts from CE to EE

Problem to solve

Currently, users are able to configure incremental rollouts in CE, however, they can only be visualized in EE (edition for which the feature was designed).

Further details

Was brought up on this conversation thread (internal reference).

Proposal

Move the frontend configuration of incremental rollouts to EE.

What does success look like, and how can we measure that?

(If no way to measure success, link to an issue that will implement a way to measure this)

Links / references

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