[Require SSO] Enterprise policy enforcement (#970)

* Initial commit of require sso authentication policy enforcement

* Updated sproc to send UseSso flag // Updated base validator to send back error message // Added changes to EntityFramework (just so its there for the future

* Update policy name // adjusted conditional to demorgan's

* Updated sproc // Added migrator script

* Added .sql file extension to DeleteOrgUserWithOrg migrator script

* Added policy // edit // strings // validation to business portal

* Change requests from review // Added Owner & Admin exemption

* Updated repository function used to get org user's type

* Updated with requested changes

util/Migrator/DbScripts/2020-10-20_00_OrgReadAbilities.sql

@@ -0,0 +1,28 @@
+IF OBJECT_ID('[dbo].[Organization_ReadAbilities]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[Organization_ReadAbilities]
+END
+GO
+
+CREATE PROCEDURE [dbo].[Organization_ReadAbilities]
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        [Id],
+        [UseEvents],
+        [Use2fa],
+        CASE 
+        WHEN [Use2fa] = 1 AND [TwoFactorProviders] IS NOT NULL AND [TwoFactorProviders] != '{}' THEN
+            1
+        ELSE
+            0
+        END AS [Using2fa],
+        [UsersGetPremium],
+        [UseSso],
+        [Enabled]
+    FROM
+        [dbo].[Organization]
+END
+GO