Add IClusterConnectionStatusObserver support #2910

Job	Run time
Azure Cosmos DB provider tests	0s
Cassandra provider tests (Cassandra, 3.11)	3m 4s
Build (ubuntu-latest)	2m 21s
Azure Storage provider tests	0s
Cassandra provider tests (Cassandra, 4.0)	3m 44s
Build (windows-latest)	4m 56s
Consul provider tests (Consul)	5m 37s
Cassandra provider tests (Cassandra, 4.1)	3m 47s
Cassandra provider tests (Cassandra, 5.0)	3m 44s
AWS DynamoDB provider tests (DynamoDB)	5m 47s
MariaDB/MySQL provider tests (MySql)	2m 47s
PostgreSQL provider tests (PostgreSql)	3m 8s
Redis provider tests (Redis)	4m 13s
Microsoft SQL Server provider tests (SqlServer)	3m 24s
ZooKeeper provider tests (ZooKeeper)	2m 42s
	49m 14s

Provide feedback