Authenticate to Azure with Certificate Based authentication and Arc enabled MSI

[TechyMatt]

Today Vault is only able to authenticate to Azure using Client ID/Client Secret or MSI (if hosted in Azure). I have two questions related to this:

1. Would a PR be accepted to enable Certificate Based authentication? The current go-autorest SDK supprots AZURE_CERTIFICATE_PATH and AZURE_CERTIFICATE_PASSWORD so the existing login logic could be iterated.

2. Are there any plans or reasons not to migrate from go-autorest to azidentity module to allow for Azure ARC enabled MSIs?

Thanks!

[MMollyy]

Considering the message from Azure that secrets will be deprecated in favor of certificates: I'm replying to this to give it a little bump.