⬆️ Update to C++23 #948

Job	Run time
quality_checks_pass	1m 1s
valgrind	5m 57s
mutate	5m 25s
sanitize (address, gcc)	5m 0s
sanitize (address, clang)	4m 21s
sanitize (undefined, clang)	5m 38s
sanitize (thread, gcc)	4m 53s
sanitize (undefined, gcc)	5m 20s
sanitize (thread, clang)	4m 50s
build_and_test_24 (clang, 18, 23, libc++, Debug)	5m 49s
build_and_test_24 (clang, 21, 23, libc++, Debug)	5m 49s
build_and_test_24 (gcc, 14, 23, libstdc++, Debug)	5m 7s
build_and_test_24 (gcc, 12, 23, libstdc++, Debug)	4m 32s
build_and_test_24 (clang, 20, 23, libc++, Debug)	3m 2s
build_and_test_24 (clang, 19, 23, libstdc++, Debug)	3m 7s
build_and_test_24 (clang, 21, 23, libstdc++, Debug)	2m 4s
build_and_test_24 (clang, 18, 23, libstdc++, Debug)	3m 53s
build_and_test_24 (clang, 19, 23, libc++, Debug)	5m 49s
build_and_test_24 (clang, 20, 23, libstdc++, Debug)	10m 2s
build_and_test_24 (gcc, 13, 23, libstdc++, Debug)	3m 59s
merge_ok	1s
	1h 35m 39s

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