Motion Matching: Check failure when adding sequence into DB that references a niagara emitter

The serialization code for the motion matching database has a check that will fail if a property has the IgnoreForMemberInitializationTestName meta tag.  Niagara emitters contain a property that has this tag so, if a user references one via a notify, the check will fail when the user adds the anim sequence to the DB.

1. Add a PlayNiagaraEffect notify to an animation. Set up a valid niagara system on the notify.
2. Create a Motion Matching Schema
3. Create a Motion Matching Database pointing to that schema
4. Drag the Animation into the Motion Matching Database
   1. Expected behaviour: animation is added to DB
   2. Actual behaviour: check failure/crash for editor users