Explicitly enable use-tokio feature flag for async-scoped #4460

Job	Run time
build-and-test	18m 36s
cli-tests	15m 27s
integration-tests	19m 36s
docker-targets-build (${{ matrix.platform.platform }})	0s
Publish binaries of ${{ matrix.project }}	0s
sharding-tests	10m 38s
wasm-rpc-stub	1m 18s
worker-tests-group1	6m 51s
docker-publish	0s
worker-tests-group2	3m 31s
worker-tests-group3	4m 30s
worker-tests-group4	5m 59s
worker-tests-group5	8m 10s
worker-tests-group6	17m 3s
worker-tests-group7	6m 14s
worker-tests-group8	12m 52s
publish	0s
publish-slack-notification	0s
	2h 10m 45s

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