Add feature flag for increasing page size

Merged Jacques Erasmus requested to merge ff-for-increasing-page-size-exponentially into master

What does this MR do?

We recently introduced a way to increase the page size exponentially over time, this puts the code behind a FF.

Screenshots or Screencasts (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Edited by Jacques Erasmus