[PR #7684/c0ba7e53 backport][3.9] Make setup.cfg packages explicit

[patchback]

This is a backport of PR #7684 as merged into master (c0ba7e5).

Avoids accidentally including other packages.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (3.9@e43e931). Click here to learn what that means.
The diff coverage is n/a.

@@          Coverage Diff           @@
##             3.9    #7687   +/-   ##
======================================
  Coverage       ?   97.31%           
======================================
  Files          ?      107           
  Lines          ?    31822           
  Branches       ?     3714           
======================================
  Hits           ?    30967           
  Misses         ?      651           
  Partials       ?      204           

Flag	Coverage Δ
CI-GHA	97.22% <0.00%> (?)
OS-Linux	96.91% <0.00%> (?)
OS-Windows	94.42% <0.00%> (?)
OS-macOS	96.56% <0.00%> (?)
Py-3.10.11	94.33% <0.00%> (?)
Py-3.10.13	96.75% <0.00%> (?)
Py-3.11.5	96.44% <0.00%> (?)
Py-3.8.10	94.31% <0.00%> (?)
Py-3.8.18	96.68% <0.00%> (?)
Py-3.9.13	94.31% <0.00%> (?)
Py-3.9.18	96.72% <0.00%> (?)
Py-pypy7.3.11	96.20% <0.00%> (?)
VM-macos	96.56% <0.00%> (?)
VM-ubuntu	96.91% <0.00%> (?)
VM-windows	94.42% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more