Fetch data for all installers, not only pip

[hugovk]

Helps #36.

❯ pypinfo --help
...
Options:
...
  --all                   Show downloads by all installers, not only pip.

pypinfo --all tells it to fetch data for all installers, and not to filter to only pip (the default).

(--all was added to pypinfo in ofek/pypinfo#51.)

This results in a cheaper BigQuery call: the pip-only query costs an extra 25% in bytes processed, in bytes billed, and in dollars; see #36 (comment).

installer_name	download_count
pip	1,121,198,711
uv	117,194,833
requests	29,828,272
poetry	23,009,454
None	8,916,745
bandersnatch	6,171,555
setuptools	1,362,797
Bazel	1,280,271
Browser	1,096,328
Nexus	593,230
Homebrew	510,247
Artifactory	69,063
pdm	62,904
OS	13,108
devpi	9,530
conda	2,272
pex	194
Total	1,311,319,514

pip is still by far the most popular installer, and unsurprising uv is up there too, with about 10% of pip's downloads.

The others are 10% of uv or less. A lot of them are mirroring services, that we wanted to exclude before.

I think given uv's importance, and my expectation that it will continue to take a bigger share of the pie, plus especially the extra cost for filtering by just pip, means that we should switch to fetching data for all downloaders. Plus the others don't account for that much of the pie.