Revert "Patch jsonargparse for Python >= 3.12.8" #14537

Job	Run time
pl-cpu (macOS-14, lightning, 3.10, 2.1)	20m 37s
pl-cpu (ubuntu-20.04, lightning, 3.10, 2.1)	14m 51s
pl-cpu (windows-2022, lightning, 3.10, 2.1)	17m 18s
pl-cpu (macOS-14, lightning, 3.11, 2.2.2)	20m 8s
pl-cpu (ubuntu-20.04, lightning, 3.11, 2.2.2)	15m 19s
pl-cpu (windows-2022, lightning, 3.11, 2.2.2)	18m 54s
pl-cpu (macOS-14, lightning, 3.11, 2.3)	20m 20s
pl-cpu (ubuntu-20.04, lightning, 3.11, 2.3)	14m 44s
pl-cpu (windows-2022, lightning, 3.11, 2.3)	19m 9s
pl-cpu (macOS-14, lightning, 3.12.7, 2.4.1)	21m 50s
pl-cpu (ubuntu-22.04, lightning, 3.12.7, 2.4.1)	19m 43s
pl-cpu (windows-2022, lightning, 3.12.7, 2.4.1)	20m 7s
pl-cpu (macOS-14, lightning, 3.12.7, 2.5.1)	21m 6s
pl-cpu (ubuntu-22.04, lightning, 3.12.7, 2.5.1)	20m 31s
pl-cpu (windows-2022, lightning, 3.12.7, 2.5.1)	22m 9s
pl-cpu (macOS-14, pytorch, 3.12.7, 2.5.1)	21m 47s
pl-cpu (ubuntu-22.04, pytorch, 3.12.7, 2.5.1)	20m 11s
pl-cpu (windows-2022, pytorch, 3.12.7, 2.5.1)	20m 9s
pl-cpu (macOS-14, lightning, 3.9, 2.1, oldest)	17m 54s
pl-cpu (ubuntu-20.04, lightning, 3.9, 2.1, oldest)	13m 35s
pl-cpu (windows-2022, lightning, 3.9, 2.1, oldest)	13m 58s
pl-cpu (macOS-14, pytorch, 3.9, 2.1)	24m 8s
pl-cpu (ubuntu-20.04, pytorch, 3.9, 2.1)	15m 11s
pl-cpu (windows-2022, pytorch, 3.9, 2.1)	14m 49s
	7h 28m 28s

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