Changes to GET /v3/serp/youtube/video_comments/tasks_fixed

api operation id SerpYoutubeVideoCommentsTasksFixed removed and replaced with YoutubeVideoCommentsTasksFixed

api operation id YoutubeVideoCommentsTasksFixed removed and replaced with SerpYoutubeVideoCommentsTasksFixed

removed the optional property oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedResponseInfo]/allOf[subschema #2]/tasks/items/oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedTaskInfo]/allOf[subschema #2]/result/items/oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedResultInfo]/date_fixed from the response with the 200 status

added the optional property oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedResponseInfo]/allOf[subschema #2]/tasks/items/oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedTaskInfo]/allOf[subschema #2]/result/items/oneOf[#/components/schemas/SerpYoutubeVideoCommentsTasksFixedResultInfo]/date_posted to the response with the 200 status