redis: Improve ClusterPubSub types (#8627)

Author: sobolevn

stubs/redis/redis/cluster.pyi

@@ -161,15 +161,22 @@ class NodesManager:
     def reset(self) -> None: ...
 
 class ClusterPubSub(PubSub):
-    node: Any
-    cluster: Any
+    node: ClusterNode | None
+    cluster: RedisCluster[Any]
     def __init__(
-        self, redis_cluster, node: Any | None = ..., host: Any | None = ..., port: Any | None = ..., **kwargs
+        self,
+        redis_cluster: RedisCluster[Any],
+        node: ClusterNode | None = ...,
+        host: str | None = ...,
+        port: int | None = ...,
+        **kwargs,
+    ) -> None: ...
+    def set_pubsub_node(
+        self, cluster: RedisCluster[Any], node: ClusterNode | None = ..., host: str | None = ..., port: int | None = ...
     ) -> None: ...
-    def set_pubsub_node(self, cluster, node: Any | None = ..., host: Any | None = ..., port: Any | None = ...) -> None: ...
-    def get_pubsub_node(self): ...
+    def get_pubsub_node(self) -> ClusterNode | None: ...
     def execute_command(self, *args, **kwargs) -> None: ...
-    def get_redis_connection(self): ...
+    def get_redis_connection(self) -> Redis[Any] | None: ...
 
 class ClusterPipeline(RedisCluster[_StrType], Generic[_StrType]):
     command_stack: list[Incomplete]