PPR API - Add 2 New Crown Charge Registration Types

Two Crown Charge registration types need to be added to PPR based on a request from MOF/RMO. These are:

Crown Charge – Employee Health Tax Act
Crown Charge – Residential Property Profit Tax Act

Developer Note:
Same access restrictions and validation rules as other crown charge class registration types. The new types are:
- EH
- RP

Update the PPR API spec.
Update the PPR API schema.