MDL-83468 phpunit: Replace uses of setMethods with onlyMethods

The PHPUnit MockBuilder `setMethods()` method has been deprecated in
favour of the more accurately defined `onlyMethods()` method.

This was previously addressed in MDL-71036 for Moodle 3.11, but these
cases have crept back in.

mod/bigbluebuttonbn/tests/instance_test.php

@@ -373,7 +373,7 @@ final class instance_test extends advanced_testcase {
      */
     public function test_user_must_wait_to_join(bool $isadmin, bool $ismoderator, bool $haswaitingroom, bool $expected): void {
         $stub = $this->getMockBuilder(instance::class)
-            ->setMethods([
+            ->onlyMethods([
                 'get_instance_var',
                 'is_admin',
                 'is_moderator',
@@ -419,7 +419,7 @@ final class instance_test extends advanced_testcase {
         bool $expected
     ): void {
         $stub = $this->getMockBuilder(instance::class)
-            ->setMethods([
+            ->onlyMethods([
                 'is_admin',
                 'is_moderator',
             ])
@@ -456,7 +456,7 @@ final class instance_test extends advanced_testcase {
      */
     public function test_get_current_user_password(bool $isadmin, bool $ismoderator, bool $expectedmodpassword): void {
         $stub = $this->getMockBuilder(instance::class)
-            ->setMethods([
+            ->onlyMethods([
                 'is_admin',
                 'is_moderator',
                 'get_moderator_password',
@@ -501,7 +501,7 @@ final class instance_test extends advanced_testcase {
      */
     public function test_get_current_user_role(bool $isadmin, bool $ismoderator, bool $expectedmodrole): void {
         $stub = $this->getMockBuilder(instance::class)
-            ->setMethods([
+            ->onlyMethods([
                 'is_admin',
                 'is_moderator',
             ])
@@ -546,7 +546,7 @@ final class instance_test extends advanced_testcase {
         bool $expected
     ): void {
         $stub = $this->getMockBuilder(instance::class)
-            ->setMethods([
+            ->onlyMethods([
                 'is_recorded',
                 'should_show_recording_button',
             ])

mod/lti/tests/local/ltiopenid/registration_test.php

@@ -407,7 +407,7 @@ EOD;
         $toolproxy['secret'] = 'peM7YDx420bo';
 
         $reghelper = $this->getMockBuilder(registration_helper::class)
-            ->setMethods(['get_tool_proxy'])
+            ->onlyMethods(['get_tool_proxy'])
             ->getMock();
         $map = [[$toolproxy['id'], $toolproxy]];
         $reghelper->method('get_tool_proxy')