feat: Implement MPRoktEventCallback on Core

[BrandonStalnaker]

Summary

• Moved MPRokt code out into its own class and replaced individual callbacks with

Testing Plan

• Was this tested locally? If not, explain why.
• Tested using sample app and confirmed succesfull placement along with smoke testing of core.

Reference Issue (For mParticle employees only. Ignore if you are an outside contributor)

• Closes https://go.mparticle.com/work/SQDSDKS-7226

[BrandonStalnaker]

So the main changes to this (outside of me moving MPRokt out into its own class)

1. Add a MPRoktEventCallback class that has a property for each callback offered on the Rokt SDK selectPlacement.
2. Update MPKitProtocols selectPlacement method to take MPRoktEventCallback as a parameter
3. Update any place that was using that old method or its selector. (MPRokt, MPRoktTests, and KitContainer mostly)

[mparticle-automation]

🎉 This PR is included in version 8.30.2 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀