Add the authenticating method using Managed Identity

[turkenf]

Adding the authentication method supported by the corresponding provider, see the link below:

• https://registry.terraform.io/providers/hashicorp/azuread/latest/docs/guides/managed_service_identity

[chatelain-io]

I would also suggest adding OIDC :

• https://registry.terraform.io/providers/hashicorp/azuread/latest/docs/guides/service_principal_oidc

[gravufo]

I created a PR to implement both managed identities and OIDC methods based on the Azure provider. Is it possible to get a review and possibly a new release of the provider for this?

Thanks!

[turkenf]

Many thanks for your effort @gravufo 🙏 we will take a look next week.