BUG: Resampling to `"B"` frequency with `closed="right"` and `label="right"` adds empty bins

[torext]

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Reproducible Example

import pandas as pd

idx = pd.date_range("5Aug2024", "13Aug2024", freq="D")  # Mon to Tue the week after
x = pd.Series(range(len(idx)), idx) + 1

# this gives unexpected output
x.resample("B", closed="right", label="right").sum()

# my expected output of the above is what the following code instead gives
x.resample("B", closed="right", label="right").sum().iloc[:-1]

# curiously, in the following different scenario the output is what I'd expect
x.resample("B", closed="left", label="left").sum()

Issue Description

When resampleing D frequency data to B frequency using closed="right" and label="right" I wouldn't expect to get the trailing empty bin. Indeed, resampling similarly with closed="left" and label="left" doesn't give any leading empty bin (which, even if undesirable, at least would be consistent with the "right" behaviour).

Expected Behavior

The output of the first resampling call in the MRE above should be what is currently output by the second resampling call in the MRE.

Installed Versions

commit : d9cdd2ee5a58015ef6f4d15c7226110c9aab8140 python : 3.11.9.final.0 python-bits : 64 OS : Linux OS-release : 5.15.0-105-generic Version : #115~20.04.1-Ubuntu SMP Mon Apr 15 17:33:04 UTC 2024 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8

pandas : 2.2.2 numpy : 1.26.4 pytz : 2024.1 dateutil : 2.9.0 setuptools : 69.5.1 pip : 24.0 Cython : None pytest : 8.2.0 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 5.2.1 html5lib : None pymysql : None psycopg2 : 2.9.9 jinja2 : 3.1.3 IPython : 8.22.2 pandas_datareader : 0.10.0 adbc-driver-postgresql: None adbc-driver-sqlite : None bs4 : 4.12.3 bottleneck : None dataframe-api-compat : None fastparquet : None fsspec : None gcsfs : None matplotlib : 3.8.4 numba : 0.59.1 numexpr : None odfpy : None openpyxl : 3.1.2 pandas_gbq : None pyarrow : 15.0.2 pyreadstat : None python-calamine : None pyxlsb : None s3fs : None scipy : 1.13.0 sqlalchemy : 2.0.29 tables : None tabulate : 0.9.0 xarray : None xlrd : None zstandard : None tzdata : 2024.1 qtpy : 2.4.1 pyqt5 : None