Changes to GET /v3/serp/bing/organic/tasks_fixed

api operation id SerpBingOrganicTasksFixed removed and replaced with BingOrganicTasksFixed

api operation id BingOrganicTasksFixed removed and replaced with SerpBingOrganicTasksFixed

removed the optional property oneOf[#/components/schemas/SerpBingOrganicTasksFixedResponseInfo]/allOf[subschema #2]/tasks/items/oneOf[#/components/schemas/SerpBingOrganicTasksFixedTaskInfo]/allOf[subschema #2]/result/items/oneOf[#/components/schemas/SerpBingOrganicTasksFixedResultInfo]/date_fixed from the response with the 200 status

added the optional property oneOf[#/components/schemas/SerpBingOrganicTasksFixedResponseInfo]/allOf[subschema #2]/tasks/items/oneOf[#/components/schemas/SerpBingOrganicTasksFixedTaskInfo]/allOf[subschema #2]/result/items/oneOf[#/components/schemas/SerpBingOrganicTasksFixedResultInfo]/date_posted to the response with the 200 status