[BUG] ensure BaseMetaObject resets at set_params; add 'test_set_params_resets_fitted_state' test to trigger error#467

fkiraly merged 5 commits intosktime:mainsktime/skbase:mainfrom

SimonBlanke:bugfix/reset_at_set_paramsSimonBlanke/skbase:bugfix/reset_at_set_paramsCopy head branch name to clipboard