Refine connection errors for connecting to cloud instance that may have been parked

When service is not available, include a message to check the status of their cluster in cloud console. This could be added to the metadata service query.

Example in the java driver: https://github.com/datastax/java-driver/blob/f4eed33caab2d692f9d2e2c119a762af2724c0f8/core/src/main/java/com/datastax/oss/driver/internal/core/config/cloud/CloudConfigFactory.java#L240-L248