Changes to Search clinical trials

added the optional property error/details to the response with the 400 status

added the optional property error/details to the response with the 401 status

added the optional property error/details to the response with the 402 status

added the optional property error/details to the response with the 403 status

added the optional property error/details to the response with the 500 status

the code response property const value insufficient_quota was added for the status 402

added the optional property error/sessionId to the response with the 400 status

added the optional property error/sessionId to the response with the 401 status

added the optional property error/sessionId to the response with the 402 status

added the optional property error/sessionId to the response with the 403 status

added the optional property error/sessionId to the response with the 500 status

endpoint added