* Add MSAL support based on Azure.Identity

* temp fix for adfs

* fix cache

* code refactoring

* code refactoring

* add Azure.Identity local package

* update test cases

* temporarily fix static analysis errors for eng bits

* fix spn+cert flow

* fix msal cache helper

* code refactoring

* update Azure.Identity to 1.4.0-beta.1

* refacotring code per review comments

* fix build error

* fix test case errors

* fix build error on MacOS

* update common assemblies

* update static analysis

* update test cases

* fix typo

* update test cases

Co-authored-by: Yeming Liu <Yeming.Liu@microsoft.com>
Co-authored-by: Yeming Liu <yeliu@microsoft.com>