TST/REF: finish collecting sample tests
Parametrizes a few tests from the frame.methods.test_sample file, splits up giant tests from the generic file.
thanks, just a note before you go all in on moving the generic tests. we ought to consider just splitting these back to series/dataframe. yes now they are essentiallly in 2 places, but we already have a ton like this. the original reason for generic was to also test panel, well that's over so something to consider.