Remove identifier uris for aro SP as it's not used

[bennerv]

Which issue this PR addresses:

ADO-12455056

Fixes breaking AAD change in Azure: https://docs.microsoft.com/en-us/azure/active-directory/develop/reference-breaking-changes#appid-uri-in-single-tenant-applications-will-require-use-of-default-scheme-or-verified-domains

What this PR does / why we need it:

We can't create service principals in single tenants (customer tenants) with an unverified custom domain (az.aro.azure.com). I don't believe we're even using the identifier_uris field at all in the app registration as well.

Test plan for issue:

Create a cluster using CLUSTER=test go run ./hack/cluster create

Create a cluster using az aro create

Is there any documentation that needs to be updated for this PR?

Not that I'm aware of.

[bennerv]

@m1kola @rogbas @hawkowl
Not sure why we ever set identifierURIs on our application registration. Seeing as there is now a breaking change in AAD if you attempt to create an app registration with an identifierURI that isn't a verified domain in your tenant.

I think this is a proper approach as we're not using the field anywhere, but not sure on the history of it if it's used elsewhere.

It's working in our INT subscription because azure.com is a verified custom domain in that subscription.

[bennerv]

this is a required parameter to pass to ApplicationCreateParameters hence us still passing it, but with an empty array.

[jiasli]

This PR is not related to Azure CLI, as it is calling AD Graph SDK azure.graphrbac directly.

Azure CLI has announced the change for idefntifierUris in Azure/azure-cli#19892.

[bennerv]

/azp run e2e

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