Fix Moodle plugins CI errors

Author: patmr7

auth/oidc/tests/privacy_provider_test.php

@@ -41,7 +41,7 @@ final class privacy_provider_test extends \core_privacy\tests\provider_testcase
      * Tests set up.
      */
     public function setUp(): void {
-        global $CFG;
+        parent::setUp();
         $this->resetAfterTest();
         $this->setAdminUser();
     }

local/o365/tests/privacy_provider_test.php

@@ -47,6 +47,7 @@ final class privacy_provider_test extends provider_testcase {
      * Tests set up.
      */
     protected function setUp(): void {
+        parent::setUp();
         $this->resetAfterTest();
         $this->setAdminUser();
     }

local/onenote/tests/privacy_provider_test.php

@@ -48,7 +48,7 @@ final class privacy_provider_test extends provider_testcase {
      * Tests set up.
      */
     public function setUp(): void {
-        global $CFG;
+        parent::setUp();
         $this->resetAfterTest();
         $this->setAdminUser();
     }