[FEA] DatetimeProperties day_name matching pandas

[mattf]

Is your feature request related to a problem? Please describe.
converting code with import cudf as pd

>>> import cudf as pd
>>> pd.__version__
'22.12.01'
>>> df = pd.Series(pd.date_range("1984", freq='s', periods=6))
>>> df.to_pandas().dt.day_name()
0    Sunday
1    Sunday
2    Sunday
3    Sunday
4    Sunday
5    Sunday
dtype: object
>>> df.dt.day_name()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'DatetimeProperties' object has no attribute 'day_name'
>>> type(df.dt)
<class 'cudf.core.series.DatetimeProperties'>

Describe the solution you'd like
implementation of day_name() matching https://pandas.pydata.org/docs/reference/api/pandas.Series.dt.day_name.html