add pyarrow sphinx intersphinx_mapping

[raybellwaves]

I'm and hoping to add a link to https://arrow.apache.org/docs/python/generated/pyarrow.parquet.ParquetDataset.html#pyarrow.parquet.ParquetDataset
in the See Also of https://docs.dask.org/en/latest/dataframe-api.html#dask.dataframe.read_parquet

My motivation is the pyarrow page has good docs and example of the filters argument. For example, I was looking for an example of how to use in with the filters arg today.

This will also make it easier for people to navigate to that page and update the read_parquet dask docs .

I'm just unsure on how to link as the page is different to packages i've linked before https://github.com/xarray-contrib/xskillscore/blob/main/docs/source/conf.py#L113

I believe the dask docs also requests a .inv in the intersphinx_mapping which is something i'm not familiar with.

If anyone has time would appreciate some help here cc. @jorisvandenbossche

Current the doc build gives

WARNING: failed to reach any of the inventories with the following issues:
intersphinx inventory 'https://arrow.apache.org/docs/python/objects.inv' not fetchable due to <class 'requests.exceptions.HTTPError'>: 404 Client Error: Not Found for url: https://arrow.apache.org/docs/python/objects.inv

It's places the link in the right place (see below) it's just not clickable.

[jrbourbeau]

Dropping python/ at the end seems to work for me locally. Could you give this a try?

Suggested change

	"pyarrow": ("https://arrow.apache.org/docs/python/", None),
	"pyarrow": ("https://arrow.apache.org/docs/", None),

[raybellwaves]

Thanks. Also worked for me locally

[jrbourbeau]

Thanks @raybellwaves!