[UnifiedAPI] : Support Unified API for SODA Projects.

[rajat-soda]

Issue/Feature Description:
Unify the API layer
- API layer to serve as the SODA Framework layer,
- On-Prem (Delfin) , & Multicloud to attach as plugins.
-
Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)