Add support for Azure DNS records

[nuwang]

While AWS, GCP and OpenStack have DNS implementations in cloudbridge, there is no implementation for Azure. An implementation could follow the same pattern as the other 3 providers, but call the Azure API instead.

[h20220025]

Hi @nuwang, I'm interested to work on this issue. Requesting to assign me this.
Thank You

[nuwang]

That's great, thanks for working on it. Have assigned it to you.

[Manishpandey11]

Hi,
I want to work on this issue. Can you please assign it to me