refactor: Port External\Manager to the query builder

Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>

Author: CarlSchwan

apps/dav/tests/unit/BackgroundJob/CleanupInvitationTokenJobTest.php

@@ -72,7 +72,7 @@ public function testRun(): void {
 			->with($function)
 			->willReturn($queryBuilder);
 		$queryBuilder->expects($this->once())
-			->method('execute')
+			->method('executeStatement')
 			->with()
 			->willReturn($stmt);
 

apps/dav/tests/unit/Migration/RefreshWebcalJobRegistrarTest.php

@@ -54,7 +54,7 @@ public function testRun(): void {
 			->with('calendarsubscriptions')
 			->willReturn($queryBuilder);
 		$queryBuilder->expects($this->once())
-			->method('execute')
+			->method('executeQuery')
 			->willReturn($statement);
 
 		$statement->expects($this->exactly(4))

apps/dav/tests/unit/Migration/RemoveDeletedUsersCalendarSubscriptionsTest.php

@@ -72,7 +72,7 @@ public function testRun(array $subscriptions, array $userExists, int $deletions)
 
 		$result = $this->createMock(IResult::class);
 
-		$qb->method('execute')
+		$qb->method('executeQuery')
 			->willReturn($result);
 
 		$result->expects($this->once())