feat: add hooks for `OverrideInit` (#517) #337

Job	Run time
downgrade (1.10, core)	19s
downgrade (1.10, downstream)	22s
test (core, 1.10, ubuntu-latest)	19m 3s
downgrade (1.10, wrappers)	17s
test (core, 1.10, macos-latest)	18m 25s
test (core, 1.10, windows-latest)	30m 18s
test (core, 1, ubuntu-latest)	28m 42s
test (core, 1, macos-latest)	20m 36s
test (core, 1, windows-latest)	42m 32s
test (downstream, 1.10, ubuntu-latest)	13m 4s
test (downstream, 1.10, macos-latest)	8m 24s
test (downstream, 1.10, windows-latest)	16m 44s
test (downstream, 1, ubuntu-latest)	22m 11s
test (downstream, 1, macos-latest)	15m 3s
test (downstream, 1, windows-latest)	26m 14s
test (wrappers, 1.10, ubuntu-latest)	11m 53s
test (wrappers, 1.10, macos-latest)	7m 28s
test (wrappers, 1.10, windows-latest)	17m 10s
test (wrappers, 1, ubuntu-latest)	19m 39s
test (wrappers, 1, macos-latest)	11m 53s
test (wrappers, 1, windows-latest)	23m 25s
	5h 53m 42s

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