Elastic-Agent: Microsoft SQL Server Integration - manage failover in a Microsoft SQL cluster

**Currently**
A named instance can be running on a machine and the 'Microsoft SQL Server' integration connecting to localhost: instance port, or the machine ip: instance port. (We are not talking here about the instance vip:instance port)

**Issue**
If the sql instance goes down, because it was moved to the other machine of the sql cluster, then the integration, actually elastic-agent, will fire a lot of errors (and possibly stops collecting logs ...). As it is not an error actually, this failover should be detected and message turned into WARNING or INFO level , not ERROR and message fired a few times. (this does not prevent the integration from trying to reconnect regularly to the instance until it comes back to the machine)

Thanks