Changes to Validate Agent YAML configuration

api tag Agent Operations added

api tag Agent Validation removed

added the optional property request_metadata to the response with the 200 status

removed subschema #2 from the yaml_file request property anyOf list

deleted the query request parameter yaml_string

added the new optional request property yaml_string

added subschema #2 to the yaml_file request property anyOf list

removed the media type text/yaml from the request body

added the new optional query request parameter yaml_string

request body became optional

added the media type multipart/form-data to the request body

removed the non-success response with the status 400

endpoint added