go azure identity is misaligned with az core

[baywet]

during the "release" of core library we upgraded from azcore 0.19.0 to 0.20.0. However there's no azidentity for that version yet.
The workaround for now is to edit the go mod and replace az identity by

github.com/Azure/azure-sdk-for-go/sdk/azidentity v0.0.0-20211101190130-7f961f26ebb5

We could either:

• wait for the azure team to release a new and aligned version
• downgrade to 0.19.0

[baywet]

The team released the new version, which addresses the issue.