Implement worker fork #4355

Job	Run time
build-and-test	14m 58s
integration-tests	20m 31s
docker-targets-build (${{ matrix.platform.platform }})	0s
cli-tests	15m 10s
Publish binaries of ${{ matrix.project }}	0s
sharding-tests	10m 59s
wasm-rpc-stub	1m 48s
worker-tests-group1	6m 25s
docker-publish	0s
worker-tests-group2	3m 47s
worker-tests-group3	4m 34s
worker-tests-group4	6m 7s
worker-tests-group5	8m 17s
worker-tests-group6	16m 54s
worker-tests-group7	6m 24s
worker-tests-group8	12m 43s
publish	0s
publish-slack-notification	0s
	2h 8m 37s

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