Changes to Count migrations

added the new optional query request parameter feature_plan_rollout_id

added the optional property params/feature_plan_rollout_id to the response with the 200 status

added the new optional query request parameter feature_id

the query request parameter plan_version_id became optional

added the optional property params/feature_id to the response with the 200 status

added the new cancelled enum value to the params/status response property for the response status 200

added the new enum value cancelled to the query request parameter status

the query request parameter plan_version_id became required

for the query request parameter limit, the max was set to 250.00

for the query request parameter limit, the min was set to 0.00