Update multi_index from develop #2484

Job	Run time
b2-windows (windows-2019)	30m 1s
b2-posix (ubuntu-20.04)	13m 46s
b2-windows (windows-2022)	31m 42s
cmake-install-posix (ubuntu-20.04)	5m 31s
b2-posix (ubuntu-22.04)	12m 3s
cmake-install-posix (ubuntu-22.04)	5m 16s
b2-posix (macos-12)	23m 58s
cmake-install-windows (windows-2019)	10m 52s
cmake-install-posix (macos-12)	7m 34s
b2-posix (macos-13)	35m 4s
cmake-install-windows (windows-2022)	10m 9s
cmake-install-posix (macos-13)	12m 32s
b2-posix (macos-14)	15m 8s
cmake-install-posix (macos-14)	5m 28s
cmake-test-posix (ubuntu-latest)	34m 11s
cmake-test-windows-quick (windows-2019)	8m 17s
cmake-test-posix-quick (ubuntu-20.04)	3m 52s
cmake-test-windows-quick (windows-2022)	8m 28s
cmake-test-posix-quick (ubuntu-22.04)	3m 59s
cmake-test-posix-quick (macos-12)	5m 26s
cmake-test-posix-quick (macos-13)	3m 57s
cmake-test-posix-quick (macos-14)	4m 6s
	4h 51m 20s

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