CAMEL-21280: azure-files: Only CredentialType.SHARED_ACCOUNT_KEY is handled

[s-clauw]

Description

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[oscerd]

Just a minor finding.

[s-clauw]

Not sure how the merge to 4.8.x will be done, is it by you or should I also do it there?

[oscerd]

We'll backport on 4.8.x