Node: Update tests for blocking commands. #5412

Job	Run time
lint-rust	1m 39s
lint-rust	1m 39s
load-engine-matrix	4s
load-engine-matrix	4s
build-amazonlinux-latest	4m 0s
build-amazonlinux-latest	4m 0s
Build and test Node wrapper on Linux musl	7m 13s
Build and test Node wrapper on Linux musl	7m 13s
test-ubuntu-latest (valkey, 7.2.5)	25m 14s
test-ubuntu-latest (valkey, 7.2.5)	18m 48s
test-ubuntu-latest (valkey, 8.0.0-rc1)	20m 5s
test-ubuntu-latest (valkey, 8.0.0-rc1)	20m 5s
	1h 50m 4s

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