Add support for private endpoint and custom DNS for Azure blob component

Hi, the current implementation of the Azure Blob component forces to use the public Microsoft endpoint when defined via configuration. 

This limitation prevents the component to be used in conjunction with MS private endpoint (which use a different DNS) or to use a custom DNS.

See BlobClientFactory.java#L2

The current issue is a feature request to remove the current limitation, effectively enabling the usage of private-endpoints and custom DNS.