Backport PR #43150 on branch 1.3.x (BUG: GroupBy.quantile fails with pd.NA)
Backport PR #43150: BUG: GroupBy.quantile fails with pd.NA
@debnathshoham 


need to change the `any_float_dtype` fixtures as that is changed in 1.4 e.g. https://github.com/pandas-dev/pandas/pull/43408/checks?check_run_id=3515311784

and update the PR to this branch

 Will have to change `any_int_ea_dtype` to `any_nullable_int_dtype`, and `any_float_dtype` to `any_float_allowed_nullable_dtype`.
Again, since not my PR will need help from maintainer.

Little confused why `test_groupby_quantile_allNA_column` is failing though @debnathshoham you can fork this PR and create a new one (or I can do it.. LMK) hi @simonjayhawkins - not sure how to fork this PR (didn't get anything on google; can try if you can point me to something that explains how to do it).
Or, are you suggesting I fork the `1.3.x branch`?  There's an "open with" button in the top right next to the issue title. (if using github through the web) Closing in favor of #43417 