Support AD/AAD account

[scarlett2018]

raised by MS tech sales team.

Work Break Down:

1. Backend user management including the end2end experience – @ydye @wangdian User Manager with AAD integration #2531

2. Web portal authentication process with AAD – @ydye Web portal authentication process with AAD #2532

3. Storage Manager support group configuration – @wangdian Storage Manager support group configuration #2530

When implement also consider the relationship or impact on these items: #2078 #2085 #921.

Design Finalize ETA 4/10

Test Case

[fanyangCS]

This is a related doc: https://docs.microsoft.com/en-us/azure/aks/aad-integration

[fanyangCS]

related LDAP. #1811

[scarlett2018]

Adding @qfyin for awareness.