feat: Update Hashed Email for Rokt

[BrandonStalnaker]

Summary

• Updated according to new specs
  (1 is the only one that affects the core sdk)

1. If other is a current identity, and the developer passes emailsha256 attribute with a different value from other identity to selectPlacements, log a warning to the user, and call identify with other using the value from emailsha256
2. Never remove other from the attributes passed to selectPlacements because it's considered a normal attribute
3. If email identity exists on the user, and emailsha256 attribute is passed to selectPlacements, do not send email attribute to the selectPlacements call. OR if email identity and other identity exist on the user, only pass emailsha256 attribute with the value from other identity

Testing Plan

• Was this tested locally? If not, explain why.
• Tested on simulator and with unit tests

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

• Closes https://go.mparticle.com/work/SQDSDKS-7555

[Mansi-mParticle]

LGTM