Support libc++ 19 #18

Job	Run time
Test with DPDK enabled / test	22m 46s
Test with C++20 modules enabled / test	5m 13s
Test (clang++, C++20, debug) / test	16m 9s
Test (clang++, C++20, dev) / test	16m 10s
Test (clang++, C++20, release) / test	16m 6s
Test (clang++, C++23, release) / test	16m 31s
Test (clang++, C++23, debug) / test	16m 32s
Test (g++, C++20, debug) / test	19m 10s
Test (g++, C++20, dev) / test	11m 51s
Test (g++, C++20, release) / test	16m 16s
Test (g++, C++23, debug) / test	10m 39s
Test (g++, C++23, release) / test	9m 6s
Test (g++, C++23, dev) / test	6m 41s
Test (clang++, C++23, dev) / test	16m 43s
	3h 19m 53s

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