[Feature Request] Support Workload identity authentication towards Azure Blob Storage Snapshot repositories

[audunsolemdal]

Is your feature request related to a problem? Please describe

Currently it is possible to authenticate to blob storage using Storage Account Key, SAS Token or managed identity.
https://docs.opensearch.org/latest/tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore/#azure-token-credential

Describe the solution you'd like

As I am running my Opensearch cluster as a helm chart inside an AKS cluster, the security best practice would be the possibility to authenticate via workload identity credential

azure.client.default.token_credential_type: "workload_identity"

Related component

Storage:Snapshots

Describe alternatives you've considered

Using Storage Account Key

Additional context

No response

[andrross]

Thanks @audunsolemdal Any interest in putting together a pull request to implement this feature?