`redis.asyncio.cluster.ClusterPipeline.__bool__()` should always return True

[jakob-keller]

Version:
redis-py 5.0.1

Platform:
CPython 3.11.6 on Fargate for arm64

Description:
In #994 it was agreed that pipelines should never be considered "false-y", i.e. always evaluate to True. The change was applied in 8b76019. Since then, asyncio and cluster support were merged and it appears as if asyncio ClusterPipeline instances currently behave differently than other pipeline instances. This is due to the following line:
https://github.com/redis/redis-py/blob/58da813e2ed3ce45d9bc14fff8d0a378b0f5ee82/redis/asyncio/cluster.py#L1432C29-L1432C29

Could you please harmonize the truth value of all pipeline types, i.e. make asyncio ClusterPipeline instances always evaluate to True?