feat: Add placement event mapping for event attributes

[prestonstarkey]

Summary

Currently in the Rokt Kit, you can only map specific events (Event Type, Event Category, & Event Name) to a Rokt attribute.

This PR expands the existing functionality to map events with specific attribute conditions to a Rokt attribute.

Example: "All screen view events with url attribute containing sale will map to saleseeker Rokt attribute.

The existing functionality still works as expected. The conditions are stored in a separate object called placementEventMappingRules. It will map an array of conditions to the unique (jsmap, value) combination.

Testing Plan

Testing locally, unit tests, going to make changes to the connection level to add the JSON custom field to allow for the placement event mapping rules

[jaissica12]

@prestonstarkey can you please change the target branch to development. The branches were initially out of sync but they are now aligned, so it can be updated now.