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Add `serialize()` to various preintegration classes #6373

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Job	Run time
ubuntu-20.04-gcc-9 Debug	31m 29s
ubuntu-20.04-gcc-9 Release	26m 41s
ubuntu-20.04-clang-9 Debug	21m 25s
ubuntu-20.04-clang-9 Release	23m 19s
ubuntu-22.04-gcc-11 Debug	26m 13s
ubuntu-22.04-gcc-11 Release	23m 9s
ubuntu-22.04-clang-14 Debug	21m 57s
ubuntu-22.04-clang-14 Release	23m 17s
	3h 17m 30s