net/tls: Wait for data_{source,sink}::close() #845

Job	Run time
Test with DPDK enabled / test	11m 30s
Test with C++20 modules enabled / test	11m 37s
Test (clang++, C++20, dev) / test	4m 27s
Test (clang++, C++20, release) / test	5m 32s
Test (clang++, C++20, debug) / test	6m 58s
Test (clang++, C++23, dev) / test	4m 28s
Test (clang++, C++23, release) / test	15m 54s
Test (clang++, C++23, debug) / test	7m 1s
Test (g++, C++20, debug) / test	10m 23s
Test (g++, C++20, dev) / test	4m 12s
Test (g++, C++20, release) / test	7m 28s
Test (g++, C++23, debug) / test	11m 59s
Test (g++, C++23, dev) / test	4m 55s
Test (g++, C++23, release) / test	8m 30s
	1h 54m 54s

Provide feedback