Update lambda2 from develop #2968

Job	Run time
b2-posix (ubuntu-20.04)	13m 18s
cmake-install-posix (ubuntu-20.04)	4m 22s
b2-posix (ubuntu-22.04)	13m 7s
b2-windows (windows-2019)	29m 21s
cmake-install-posix (ubuntu-22.04)	4m 42s
cmake-install-windows (windows-2019)	10m 6s
b2-posix (ubuntu-24.04)	14m 1s
b2-windows (windows-2022)	31m 21s
cmake-install-posix (ubuntu-24.04)	5m 8s
cmake-install-windows (windows-2022)	9m 48s
b2-posix (macos-13)	28m 3s
cmake-install-posix (macos-13)	7m 39s
b2-posix (macos-14)	11m 39s
cmake-install-posix (macos-14)	5m 15s
b2-posix (macos-15)	13m 18s
cmake-test-posix-quick (ubuntu-20.04)	3m 10s
cmake-install-posix (macos-15)	6m 29s
cmake-test-posix (ubuntu-latest)	48m 1s
cmake-test-posix-quick (ubuntu-22.04)	2m 54s
cmake-test-posix-quick (ubuntu-24.04)	2m 9s
cmake-test-windows-quick (windows-2019)	4m 54s
cmake-test-posix-quick (macos-13)	6m 23s
cmake-test-windows-quick (windows-2022)	5m 9s
cmake-test-posix-quick (macos-14)	3m 47s
cmake-test-posix-quick (macos-15)	4m 58s
	4h 49m 2s

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