Modify connection management to support Active Directory authType for non-SQL DBs (#8434)

* First attempt to add Azure MFA login for PostgreSQL

* Finish merge with master

* Fix auth type default selection

* Add AzureMFAAndUser auth type for Orcas

* Fix formatting

* Update change log

* Incorporate some review comments

* Missed an occurrence of AzureResource

* Try to move all changes out of azdata.d.ts and sqlops.d.ts

* Concrete implementation of ConnectionProfile in azdata no longer has azureAccount

* Use enum names instead of numbers in config files

src/sql/platform/connection/common/constants.ts

@@ -24,6 +24,7 @@ export const passwordChars = '***************';
 export const sqlLogin = 'SqlLogin';
 export const integrated = 'Integrated';
 export const azureMFA = 'AzureMFA';
+export const azureMFAAndUser = 'AzureMFAAndUser';
 
 /* CMS constants */
 export const cmsProviderName = 'MSSQL-CMS';