Support for passing KeyVault access token for when CMK is Azure KeyVault reference

[ThibaultLesuisse]

Feature request

We currently deploy our DACPAC's with sqlpackage in our Azure DevOps pipeline. We now want to enable Column Encryption with CMK and CEK on our Azure Databases. Other tools like the SqlServer Powershell Module have support for passing a KeyVault AccessToken. Currently the sqlpackage supports passing the clientId and clientSecret of the Service Principal that has access to a KeyVault. We use workload identity for the Service Connections so we don't have a clientSecret. To gain access to certain Azure resources we exchange our token for an access token to that specific resource. Could the sqlpackage also accept an Azure Keyvault AccessToken so we can continue to use workload identity based Service Connections?