Azure Fusion integration should not fail when managed identity auth is present

[swampie]

New feature

Usage scenario

Now that Azure Managed Identity has been merged the support for fusion should also be enabled. The goal of this feature is to prevent failures when a managed identity is correctly configured and pass the configuration to fusion.

Suggest implementation

• one change should be the removal/extension of this logic

[swampie]

one possibility to prevent changes on fusion (if it relies on sas tokens) is to change the getOrCreateSasToken() to try to generate a token with the managed identity (unsure if this is possible)