Flaky CI related investigation and fixes #4515

Job	Run time
docker-targets-build (${{ matrix.platform.platform }})	0s
integration-tests	20m 33s
build-and-test	15m 45s
cli-tests	7m 32s
Publish binaries of ${{ matrix.project }}	0s
sharding-tests	11m 24s
wasm-rpc-stub	1m 3s
worker-tests-group1	6m 51s
docker-publish	0s
worker-tests-group2	4m 19s
worker-tests-group3	5m 24s
worker-tests-group4	4m 39s
worker-tests-group5	7m 58s
worker-tests-group6	8m 17s
worker-tests-group7	6m 56s
worker-tests-group8	8m 15s
publish	1s
publish-slack-notification	1s
	1h 48m 58s

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