Skip flaky recursion test on PyPy

[jacobtylerwalls]

Follow-up to 03cd54c.

No one has the time or inclination to find a stable recursion limit that is low enough to reliably trigger the UserWarning without actually causing core dumps or other problems, esp. when running with coverage.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.21%. Comparing base (b5bb771) to head (7e2d6fe).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2661   +/-   ##
=======================================
  Coverage   93.21%   93.21%           
=======================================
  Files          93       93           
  Lines       11083    11083           
=======================================
  Hits        10331    10331           
  Misses        752      752           

Flag	Coverage Δ
linux	93.09% <ø> (ø)
pypy	93.21% <ø> (ø)
windows	93.21% <ø> (ø)

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[Pierre-Sassoulas]

Strongly agree with this decision

[github-actions]

The backport to maintenance/3.3.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-maintenance/3.3.x maintenance/3.3.x
# Navigate to the new working tree
cd .worktrees/backport-maintenance/3.3.x
# Create a new branch
git switch --create backport-2661-to-maintenance/3.3.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 30ddb250a4c15aadf5d397fa42a96a2ac108c8d8
# Push it to GitHub
git push --set-upstream origin backport-2661-to-maintenance/3.3.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-maintenance/3.3.x

Then, create a pull request where the base branch is maintenance/3.3.x and the compare/head branch is backport-2661-to-maintenance/3.3.x.