Regression in is_file for HTTP path #535
Description
As of v0.3.8, http directories are incorrectly identified as a regular file.
Reproducing snippet
import upath
known_dir = upath.UPath("https://data.lsdb.io/hats/")
f"as of {upath.__version__}, known dir {'IS' if known_dir.is_dir() else 'is NOT'} is a directory, known dir {'IS' if known_dir.is_file() else 'is NOT'} is a regular file"
And outputs from running under two most recent versions:
'as of 0.3.7, known dir IS is a directory, known dir is NOT is a regular file'
'as of 0.3.8, known dir IS is a directory, known dir IS is a regular file'