Add plural storage containers

[Tarmil]

The changes in this PR are as follows:

• Storage: add plural add_blob_containers, add_public_containers, add_private_containers, add_file_shares, add_file_shares_with_quota and add_queues (string seq).
• Storage: fix quadratic complexity in add_queues (StorageQueueConfig seq).

I have read the contributing guidelines and have completed the following:

• [x] Tested my code end-to-end against a live Azure subscription.
• [x] Updated the documentation in the docs folder for the affected changes.
• [x] Written unit tests against the modified code that I have made.
• [x] Updated the release notes with a new entry for this PR.
• [x] Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

If I haven't completed any of the tasks above, I include the reasons why here:

Below is a minimal example configuration that includes the new features, which can be used to deploy to Azure:

let account = storageAccount {
    add_blob_containers [ "blob1"; "blob2" ]
    add_public_containers [ "public1"; "public2" ]
    add_private_containers [ "private1"; "private2" ]
    add_file_shares [ "share1"; "share2" ]
    add_file_shares_with_quota [ "share3"; "share4" ] 1024<Gb>
    add_queues [ "queue1"; "queue2" ]
}