sharded.hh: add invoke_on variant for a shard range #583

Job	Run time
Test with DPDK enabled / test	17m 27s
Test with C++20 modules enabled / test	5m 6s
Test (clang++, C++20, debug) / test	11m 13s
Test (clang++, C++20, dev) / test	8m 58s
Test (clang++, C++20, release) / test	9m 47s
Test (clang++, C++23, debug) / test	11m 15s
Test (clang++, C++23, dev) / test	9m 18s
Test (clang++, C++23, release) / test	15m 42s
Test (g++, C++20, debug) / test	14m 11s
Test (g++, C++20, dev) / test	7m 39s
Test (g++, C++20, release) / test	11m 33s
Test (g++, C++23, debug) / test	14m 20s
Test (g++, C++23, dev) / test	7m 52s
Test (g++, C++23, release) / test	12m 9s
	2h 36m 30s

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