feat: expose getHomeAzInfo api in cns to retrieve node home az infos from NMAgent

[ZetaoZhuang]

Reason for Change:

To enable AZR , dnc need to call CNS to get home az infos from NMAgent. This PR is for exposing the getHomeAzInfo api in cns to achieve that.

Issue Fixed:

Requirements:

• [x] uses conventional commit messages
• [ ] includes documentation
• [x] adds unit tests

Notes: task link