TST: slow test_nearest_upsample_with_limit with tzlocal

[jbrockmendel]

Doing pytest pandas/tests --skip-slow --durations=10 the top two entries are

71.76s call     pandas/tests/resample/test_datetime_index.py::test_nearest_upsample_with_limit[tzlocal()-30S-Y]
59.86s call     pandas/tests/resample/test_datetime_index.py::test_nearest_upsample_with_limit[tzlocal()-30S-10M]

Because this uses the tz_aware_fixture, there isn't a trivial way to add a pytest.mark.slow to this, but figuring something out may be worthwhile.

[dsaxton]

This test came up here #34131 and @jreback pointed out that it's resampling at probably too fine a frequency

[jbrockmendel]

That and tzlocal is just slower than everything else in general. (ive got a branch implementing a cython equivalent i need to circle back to)

Could do something like:

@pytest.mark.slow
def test_foo_tzlocal():
    return thing(tzlocal)

def test_foo(tz_aware_fixture):
    if tz_aware_fixture is tzlocal:
         return/skip/whatever
    thing(tz_aware_fixture)

[jreback]

no easiest way is simple to split it into 2 tests and not try to upsample 1ms to 1y