Changes to Get span annotations filtered by span_ids and/or identifier.

added the new optional query request parameter identifier

the query request parameter span_ids became optional

query request parameter span_ids list-of-types was widened by adding types null

for the query request parameter span_ids, the minItems was decreased from 1 to 0

for the query request parameter span_ids, the type was generalized from array to no type

the query request parameter span_ids became required

query request parameter span_ids list-of-types was narrowed by removing types null

for the query request parameter span_ids, the minItems was increased from 0 to 1

for the query request parameter span_ids, the type changed from no type to array

deleted the query request parameter identifier