Issue #3254199 by longwave: Remove Prophecy PhpUnit compatibility check

...les/media/tests/src/Functional/ProviderRepositoryTest.php

core/tests/Drupal/KernelTests/KernelTestBase.php

.../PhpUnitCompatibility/PhpUnit9/TestCompatibilityTrait.php

...tation/Plugin/Discovery/AnnotationBridgeDecoratorTest.php

...pal/Tests/Component/DependencyInjection/ContainerTest.php

...ependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php

...sts/Drupal/Tests/Component/Gettext/PoStreamWriterTest.php

...s/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php

...oser/Plugin/VendorHardening/VendorHardeningPluginTest.php

core/tests/Drupal/Tests/UnitTestCase.php