Currently, the code to transform an implicit create to an explicit create is guarded by featureFlagTrackUnshardedCollectionsUponCreate. However, this change doesn't actually depend on this part of the project, and we want to introduce this change in 8.0 regardless of the track unsharded project.

Instead of guarding this with the project's feature flag, we should introduce a new feature flag and use that to guard this transition.