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

extensions/mssql/package.json

@@ -557,7 +557,13 @@
           "description": "%mssql.connectionOptions.authType.description%",
           "groupName": "Security",
           "valueType": "category",
-          "defaultValue": null,
+          "defaultValue": "SqlLogin",
+          "defaultValueOsOverrides": [
+            {
+              "os": "Windows",
+              "defaultValueOverride": "Integrated"
+            }
+          ],
           "objectType": null,
           "categoryValues": [
             {