Proposal(CLI): after_instantiate_classes hook #26330

Job	Run time
build-packages / init	10s
build-packages / build-packages (lightning)	20s
build-packages / build-packages (fabric)	19s
build-packages / build-packages (pytorch)	24s
install-pkg (ubuntu-22.04, fabric, 3.9)	1m 36s
install-pkg (ubuntu-22.04, fabric, 3.11)	2m 6s
install-pkg (ubuntu-22.04, pytorch, 3.9)	1m 47s
install-pkg (ubuntu-22.04, pytorch, 3.11)	1m 45s
install-pkg (ubuntu-22.04, lightning, 3.9)	1m 42s
install-pkg (ubuntu-22.04, lightning, 3.11)	1m 45s
install-pkg (ubuntu-22.04, notset, 3.9)	1m 52s
install-pkg (ubuntu-22.04, notset, 3.11)	1m 45s
install-pkg (macOS-14, fabric, 3.9)	59s
install-pkg (macOS-14, fabric, 3.11)	41s
install-pkg (macOS-14, pytorch, 3.9)	40s
install-pkg (macOS-14, pytorch, 3.11)	51s
install-pkg (macOS-14, lightning, 3.9)	46s
install-pkg (macOS-14, lightning, 3.11)	45s
install-pkg (macOS-14, notset, 3.9)	42s
install-pkg (macOS-14, notset, 3.11)	40s
install-pkg (windows-2022, fabric, 3.9)	1m 30s
install-pkg (windows-2022, fabric, 3.11)	1m 43s
install-pkg (windows-2022, pytorch, 3.9)	1m 55s
install-pkg (windows-2022, pytorch, 3.11)	1m 57s
install-pkg (windows-2022, lightning, 3.9)	2m 54s
install-pkg (windows-2022, lightning, 3.11)	2m 40s
install-pkg (windows-2022, notset, 3.9)	1m 48s
install-pkg (windows-2022, notset, 3.11)	2m 14s
	38m 16s

Provide feedback