Add user-POJO mappers support for key-value view regarding marshallers initially implemented in
IGNITE-13618 and mappers in IGNITE-15782
- Mapper is not required to be Serializable as it is intended to be moved to a remote node.
- Mapper can be used for schema generation from user classes (annotation schema configuration IGNITE-13749) and user object validation against the schema.
- Mapper might be highly coupled with marshallers\serislizers.
- Implement all RecordView operations (maybe excl. invoke IGNITE-14488).
- Add integration tests.