Code storage: Azure Blob integration

[nicoloboschi]

Fixes #402

Changes:

• Added a new code storage implementation compatible with azure blob storage

Helm configuration:

codeStorage:
  type: azure
  configuration:
    endpoint: "https://<your-storage-account>.blob.core.windows.net"
    # only for shared storage account key auth
     storage-account-name: <your-storage-account>   
     storage-account-key: XXXX
     # or
     storage-account-connection-string: "DefaultEndpointsProtocol=https;AccountName=xx;AccountKey=xx;EndpointSuffix=core.windows.net"
     # or using sas tokn
     sas-token: XXXX

by default it creates a container langstream-code-storage, you can change it by setting:

codeStorage:
  configuration
    container: <another-container-name> 

[eolivelli]

LGTM

Maybe we could create a langstream-codestorage module
and move the langstream-codestorage-s3 and langstream-codestorage-azure-blob-storage modules there