Summary

• Adds custom mParticle event logging whenever selectPlacements / executeWithIdentifier is called, capturing the prepared attributes for analytics
• Implements logSelectPlacementEvent: in MPKitRokt and calls it from both the UIKit path (executeWithIdentifier:) and SwiftUI path (MPRoktLayout)
• Adds unit tests for the new event logging functionality
• Fix CI test job by using simulator-action to install iOS Simulator runtime

Additional Notes

• logSelectPlacementEvent: is exposed in the public header because the Swift module (mParticle-Rokt-Swift) needs to call it from MPRoktLayout.
• This is the iOS implementation of feat: Add custom event logging for selectplacements mparticle-android-integration-rokt#113

Testing Plan

• Was this tested locally? If not, explain why.
• Ran unit test suite and all passing

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

• Closes SDKE-787