github: cancel a job if it takes longer than 40 minutes #100

Job	Run time
Test with DPDK enabled / test	11m 5s
Test with C++20 modules enabled / test	2m 28s
Test (clang++, C++20, debug) / test	6m 33s
Test (clang++, C++20, dev) / test	4m 14s
Test (clang++, C++20, release) / test	5m 2s
Test (clang++, C++23, debug) / test	6m 56s
Test (clang++, C++23, dev) / test	4m 15s
Test (clang++, C++23, release) / test	4m 37s
Test (g++, C++20, debug) / test	7m 2s
Test (g++, C++20, dev) / test	4m 9s
Test (g++, C++20, release) / test	5m 17s
Test (g++, C++23, debug) / test	7m 31s
Test (g++, C++23, dev) / test	4m 34s
Test (g++, C++23, release) / test	5m 22s
	1h 19m 5s

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