[WIP] Refactor BlobClient into a StorageBlobService for per-call subscription#7074

Copilot wants to merge 1 commit intomainAzure/azure-dev:mainfrom

copilot/refactor-blobclient-to-storageblobserviceAzure/azure-dev:copilot/refactor-blobclient-to-storageblobserviceCopy head branch name to clipboard