[Storage] Flattened clients v2

[vincenttran-msft]

.tsp: Azure/azure-rest-api-specs#37830

[LarryOsterman]

You may be able to use #[tracing::new] here - it should work and hide the tracer initialization.

[vincenttran-msft]

Thanks Larry, that works out much cleaner! However, this requires us to make the from_url function on the underlying GeneratedBlobClient now public (which is not desired as everything should go through our convenience layer).

This is not yet the final design, so Storage will discuss internally and ensure we land on our final design before requesting any Core code changes (i.e. removing the requirement here that the visibility must be public to utilize the macro)

[LarryOsterman]

You might want to resync with main (which may be painful because of Heath's recent changes). He ran into the same issue and we decided that the public requirement wasn't necessary or appropriate.

So changing core is probably the right thing to do.