Merge pull request #1006 from akoshelev/gateway-shard-comms #274

Job	Run time
Release builds and tests	5m 28s
Additional Builds and Concurrency Tests	7m 1s
Basic Checks	7m 15s
Measure coverage	8m 59s
miri	2m 39s
sanitize (address)	5m 39s
sanitize (address, multi-threading)	4m 12s
sanitize (leak)	3m 30s
sanitize (leak, multi-threading)	4m 15s
	48m 58s

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