Remove data protection keys from Azure blob storage when deleting tenant

[microposmp]

Fixes #16799

[Piedone]

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[Piedone]

See #16839 (comment) and #16839 (comment).

[MikeAlhayek]

@microposmp did you try it with a live connection to Azure to ensure it is removing the correct file for the tenant only?

[microposmp]

Yes I've tested it against Azure blob storage. Here are a few screenshots from before and after deleting a tenant.

Before:

After: