Review documented error response codes

[eric-murray]

Problem description
The API OAS definition documents error codes that either would never be returned, or should not be documented as they have no API-specific meaning.

For example:
400 OUT_OF_RANGE
403 INVALID_TOKEN_CONTEXT
404 IDENTIFIER_NOT_FOUND
500 INTERNAL
503 UNAVAILABLE

Expected action

• Review the Commonalities Design Guide section on Standardized Use of CAMARA Error Responses
  • In particular, note:

    Error statuses 405, 406, 410, 412, 415, and 5xx: These error statuses are not documented by default in the API specification. However, they SHOULD be included if there is a relevant use case that justifies their documentation.

• Remove error response codes that are not relevant to this API, or that do not need to be documented as they do not have any special meaning for this API

Additional context
None