[1.9] Document support for Azure AD auth in Azure Storage Queue and Azure SignalR bindings

[ItalyPaleAle]

What content needs to be created or modified? These components are gaining support for AAD auth in 1.9:

• bindings.azure.storagequeues
• bindings.azure.signalr

Additionally, there have been a few more small changes:

• bindings.azure.storagequeues: the way custom endpoints are specified changed slightly, so it's consistent with Azure Blob Storage (does not use "production-style" URLs anymore)
• bindings.azure.signalr: added a few more (optional) metadata keys

The docs for those bindings need to be updated to reflect the new metadata keys

The associated pull request from dapr/dapr, dapr/components-contrib, or other Dapr code repos https://github.com/dapr/components-contrib/pull/1842 https://github.com/dapr/components-contrib/pull/1852