yield thread while waiting for native json rpc #4908

Job	Run time
test (ubuntu-latest, 27.2, false)	2m 16s
test (ubuntu-latest, 28.2, false)	2m 40s
test (ubuntu-latest, 29.1, false)	2m 17s
test (macos-latest, 27.2, false)	4m 4s
test (macos-latest, 28.2, false)	5m 41s
test (macos-latest, 29.1, false)	5m 10s
test (windows-latest, 27.2, false)	2m 33s
test (windows-latest, 28.2, false)	3m 48s
test (windows-latest, 29.1, false)	2m 55s
test (ubuntu-latest, snapshot, true)	1m 22s
test (macos-latest, snapshot, true)	2m 54s
test (windows-latest, snapshot, true)	40s
	36m 20s

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