minor #42220 fix intersection types in tests (Tobion)

This PR was merged into the 4.4 branch.

Discussion
----------

fix intersection types in tests

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

e5d5e9967f fix intersection types in tests

Author: nicolas-grekas

Tests/Command/SetupTransportsCommandTest.php

@@ -24,7 +24,7 @@ class SetupTransportsCommandTest extends TestCase
     public function testReceiverNames()
     {
         // mock a service locator
-        /** @var MockObject|ServiceLocator $serviceLocator */
+        /** @var MockObject&ServiceLocator $serviceLocator */
         $serviceLocator = $this->createMock(ServiceLocator::class);
         // get method must be call twice and will return consecutively a setup-able transport and a non setup-able transport
         $serviceLocator->expects($this->exactly(2))
@@ -49,7 +49,7 @@ public function testReceiverNames()
     public function testReceiverNameArgument()
     {
         // mock a service locator
-        /** @var MockObject|ServiceLocator $serviceLocator */
+        /** @var MockObject&ServiceLocator $serviceLocator */
         $serviceLocator = $this->createMock(ServiceLocator::class);
         // get method must be call twice and will return consecutively a setup-able transport and a non setup-able transport
         $serviceLocator->expects($this->exactly(1))
@@ -74,7 +74,7 @@ public function testReceiverNameArgumentNotFound()
         $this->expectException(\RuntimeException::class);
         $this->expectExceptionMessage('The "not_found" transport does not exist.');
         // mock a service locator
-        /** @var MockObject|ServiceLocator $serviceLocator */
+        /** @var MockObject&ServiceLocator $serviceLocator */
         $serviceLocator = $this->createMock(ServiceLocator::class);
         // get method must be call twice and will return consecutively a setup-able transport and a non setup-able transport
         $serviceLocator->expects($this->exactly(0))