Remove Media files for a removed tenant when using Azure Blob Storage

[Piedone]

Is your feature request related to a problem? Please describe.

If you remove a tenant, its Media files are only removed if they use the default local storage in App_Data. When using Azure Blob Storage though, they remain.

Similar to #16404.

Related: #4950.

Describe the solution you'd like

Add an IShellRemovingHandler to OrchardCore.Media.Azure that removes Media files from Azure Blob Storage too. This should support both removing the whole container if tenants' Media are stored in separate containers, or just the "folder" if a single container is used.

Describe alternatives you've considered

You can also have a custom IShellRemovingHandler implementation for this, but I think this should be a core functionality.

[github-actions]

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