Event Hub Scaler should use parameter eventHubName when the connection string doesn't contain the EntityPath

[v-shenoy]

Proposal

If the connection string provided doesn't contain the EntityPath (i.e - it's the connection string for the Event Hub namespace, and not the Event Hub itself), the scaler should use the eventHubName parameter and append it to the connection string.

Use-Case

The Functions Event Hub trigger expects the connection string for the namespace, and not a hub. This differs from the format that KEDA expects for the connection string. The pod for the EH Function will generally contain the namespace connection string (without the EntityPath). This makes it harder to generate scaled objects through code.

Anything else?

No response