Adding test for legacy checkpoint created with 2.3.3

[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-13, lightning, 3.8, 2.1, oldest)	success	✅
pl-cpu (macOS-14, lightning, 3.10, 2.1)	success	✅
pl-cpu (macOS-14, lightning, 3.10, 2.2)	success	✅
pl-cpu (macOS-14, lightning, 3.10, 2.3)	success	✅
pl-cpu (ubuntu-20.04, lightning, 3.8, 2.1, oldest)	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, 2.1, oldest)	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-14, pytorch, 3.8, 2.1)	success	✅
pl-cpu (ubuntu-20.04, pytorch, 3.8, 2.1)	success	✅
pl-cpu (windows-2022, pytorch, 3.8, 2.1)	success	✅
pl-cpu (macOS-12, pytorch, 3.11, 2.1)	success	✅
pl-cpu (ubuntu-22.04, pytorch, 3.11, 2.1)	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.

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Thank you for your contribution! 💜

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