TST: added groupby apply test for nan coerce (#44038)
TST: added groupby apply test for nan coerce (#44038)


datapythonista/pandas,jorisvandenbossche/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,pandas-dev/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,datapythonista/pandas,datapythonista/pandas,jorisvandenbossche/pandas,datapythonista/pandas,pandas-dev/pandas