[MRG + 2] ENH add sample_weight support to Pipeline.score (#7723)

* add sample_weight support to Pipeline.score

* TST check that pipe.score raises TypeError for unsorrported arguments

* TST check error message for invalid score_params in pipeline.score

* TST check that pipe.fit raises TypeError when argument is not supported

* only support sample_weight argument

* whats_new: mention sample_weight in Pipeline.score