Customizable is_trivially_copyable #2032

Job	Run time
macos-latest: clang++ Release Threads	12m 23s
macos-latest: clang++ Release OneTBB	1m 48s
macos-latest: clang++ Release PaRSEC	3m 0s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	36m 39s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	2m 25s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 33s
macos-latest: clang++ Debug Threads	22m 38s
macos-latest: clang++ Debug OneTBB	2m 57s
macos-latest: clang++ Debug PaRSEC	2m 29s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	48m 54s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	2m 11s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 17s
	2h 20m 14s

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