Count number of modules in train/eval mode in ModelSummary #25965

Job	Run time
build-packages / init	5s
build-packages / build-packages (lightning)	19s
build-packages / build-packages (fabric)	21s
build-packages / build-packages (pytorch)	28s
install-pkg (ubuntu-22.04, fabric, 3.9)	1m 47s
install-pkg (ubuntu-22.04, fabric, 3.11)	1m 52s
install-pkg (ubuntu-22.04, pytorch, 3.9)	1m 58s
install-pkg (ubuntu-22.04, pytorch, 3.11)	1m 34s
install-pkg (ubuntu-22.04, lightning, 3.9)	1m 38s
install-pkg (ubuntu-22.04, lightning, 3.11)	1m 41s
install-pkg (ubuntu-22.04, notset, 3.9)	1m 36s
install-pkg (ubuntu-22.04, notset, 3.11)	1m 38s
install-pkg (macOS-12, fabric, 3.9)	1m 18s
install-pkg (macOS-12, fabric, 3.11)	1m 1s
install-pkg (macOS-12, pytorch, 3.9)	1m 6s
install-pkg (macOS-12, pytorch, 3.11)	1m 6s
install-pkg (macOS-12, lightning, 3.9)	1m 16s
install-pkg (macOS-12, lightning, 3.11)	1m 6s
install-pkg (macOS-12, notset, 3.9)	1m 7s
install-pkg (macOS-12, notset, 3.11)	1m 7s
install-pkg (windows-2022, fabric, 3.9)	2m 4s
install-pkg (windows-2022, fabric, 3.11)	2m 31s
install-pkg (windows-2022, pytorch, 3.9)	2m 12s
install-pkg (windows-2022, pytorch, 3.11)	2m 59s
install-pkg (windows-2022, lightning, 3.9)	2m 23s
install-pkg (windows-2022, lightning, 3.11)	1m 58s
install-pkg (windows-2022, notset, 3.9)	2m 24s
install-pkg (windows-2022, notset, 3.11)	2m 23s
	42m 58s

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