Handle missing `connection_kwargs` in `patch_redis_client` #2343

Job	Run time
grpc, python 3.7, ubuntu-20.04	2m 41s
grpc, python 3.8, ubuntu-20.04	3m 28s
grpc, python 3.9, ubuntu-20.04	3m 10s
grpc, python 3.10, ubuntu-20.04	7m 49s
grpc, python 3.11, ubuntu-20.04	1m 31s
All grpc tests passed or skipped	1s
	18m 40s

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