Adding test for legacy checkpoint created with 2.3.1

[pl-ghost]

This is automated addition of created checkpoints with the latest lightning release!

cc @awaelchli @Borda

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 pytorch_lightning: Tests workflow

Check ID	Status
pl-cpu (macOS-11, lightning, 3.8, 2.0, oldest)	success	✅
pl-cpu (macOS-11, lightning, 3.10, 2.0)	success	✅
pl-cpu (macOS-11, lightning, 3.10, 2.1)	success	✅
pl-cpu (macOS-11, lightning, 3.10, 2.2)	success	✅
pl-cpu (macOS-14, lightning, 3.10, 2.3)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.8, 2.0, oldest)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.10, 2.0)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.10, 2.1)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.10, 2.2)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.10, 2.3)	success	✅
pl-cpu (windows-2022, lightning, 3.8, 2.0, oldest)	success	✅
pl-cpu (windows-2022, lightning, 3.10, 2.0)	success	✅
pl-cpu (windows-2022, lightning, 3.10, 2.1)	success	✅
pl-cpu (windows-2022, lightning, 3.10, 2.2)	success	✅
pl-cpu (windows-2022, lightning, 3.10, 2.3)	success	✅
pl-cpu (macOS-11, pytorch, 3.8, 2.0)	success	✅
pl-cpu (ubuntu-20.04, pytorch, 3.8, 2.0)	success	✅
pl-cpu (windows-2022, pytorch, 3.8, 2.0)	success	✅
pl-cpu (macOS-12, pytorch, 3.11, 2.0)	success	✅
pl-cpu (macOS-12, pytorch, 3.11, 2.1)	success	✅
pl-cpu (ubuntu-22.04, pytorch, 3.11, 2.0)	success	✅
pl-cpu (ubuntu-22.04, pytorch, 3.11, 2.1)	success	✅
pl-cpu (windows-2022, pytorch, 3.11, 2.0)	success	✅
pl-cpu (windows-2022, pytorch, 3.11, 2.1)	success	✅

These checks are required after the changes to tests/legacy/back-compatible-versions.txt.

---

Thank you for your contribution! 💜

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51%. Comparing base (b6be13c) to head (3f54b8a).
Report is 74 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (b6be13c) and HEAD (3f54b8a). Click for more details.

HEAD has 184 uploads less than BASE

Flag	BASE (b6be13c)	HEAD (3f54b8a)
python3.10	19	12
cpu	68	24
lightning	40	15
pytest	50	0
examples	9	0
app	9	0
python3.8	12	6
lightning_fabric	10	0
python3.11	20	6
tpu	2	0
gpu	4	0
lightning_app	3	0
pytorch_lightning	10	9

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #20023      +/-   ##
==========================================
- Coverage      84%      51%     -33%     
==========================================
  Files         427      419       -8     
  Lines       35505    35352     -153     
==========================================
- Hits        29782    18029   -11753     
- Misses       5723    17323   +11600