Feature: Support login with OpenID Connect (OIDC) and managed identity.

Currently this workload wants to reference Service Principal, but the newish standard is to actually use OpenID Connect (OIDC) and managed identity. https://github.com/Azure/login#login-with-openid-connect-oidc-recommended

Currently the MLOps_v2 calls back for
```
secrets:
creds:
```

Doesn't allow you to use OIDC

```
client-id: ${{ secrets.AZURE_CLIENT_ID }}
tenant-id: ${{ secrets.AZURE_TENANT_ID }}
subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
```