OARIS2 — Update GraphQL PSM Mapping

The GraphQL mapping in the specification and defined in the schema files leads to an unnecessarily complicated implementation of the standard and should be simplified

Regenerate GraphQL PSM with updated mapping

The updated mappings from PIM to GraphQL as incorporated into the TDAI beta spec and C2INav v1.1 RTF should be used. This generates a single schema for each standard avoiding class duplication, has a flatter structure with respect to endpoint methods, has less duplication with respect to input types and uses a simpler mapping with less duplication for inheritance (consistent with that also now used for DDS/IDL - see OARIS2-27). The proposed schema file is attached.