Bulk Confirm (#1345)

* Add support for bulk confirm

* Add missing sproc to migration

* Change ConfirmUserAsync to internally use ConfirmUsersAsync

* Refactor to be a bit more readable

* Change BulkReinvite and BulkRemove to return a list of errors/success

* Refactor

* Fix removing owner preventing removing non owners

* Add another unit test

* Use fixtures for OrganizationUser and Policies

* Fix spelling

src/Sql/dbo/Stored Procedures/User_ReadByIds.sql

@@ -0,0 +1,18 @@
+CREATE PROCEDURE [dbo].[User_ReadByIds]
+@Ids AS [dbo].[GuidIdArray] READONLY
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    IF (SELECT COUNT(1) FROM @Ids) < 1
+        BEGIN
+            RETURN(-1)
+        END
+
+    SELECT
+        *
+    FROM
+        [dbo].[UserView]
+    WHERE
+        [Id] IN (SELECT [Id] FROM @Ids)
+END