Run php-cs-fixer with void_return rule

Closes #3421418

This file doesn't match the exclude patterns, but changes seem harmless.

Yeah I checked a bunch of these changes, including things like validateForm and submitForm and they are harmless

added 12 commits

• 981d4f63...4ce2bdef - 2 earlier commits
• 39cb5e37 - Fix...
• b557c652 - Revert DbLogResourceTest
• ded5f3e1 - Revert MessageResourceTestBase
• bdd91bb7 - Revert EntityResourceTestBase
• 203abc69 - Remove StyleTest from baseline
• 41e66407 - Fix \Drupal\BuildTests\Framework\BuildTestBase::assertCommandSuccessful
• ea91e3b7 - Fix...
• 350a55b4 - Fix \Drupal\FunctionalTests\Installer\InstallerSiteConfigProfileTest::setUpSite
• c507ffa4 - Fix \Drupal\KernelTests\Config\DefaultConfigTest::doTestsOnConfigStorage
• c65749fe - Fix \Drupal\KernelTests\KernelTestBaseTest

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added 1 commit

• 9a48b596 - Fix EntityTestComputedFieldNormalizerTest

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added 5 commits

• 4e1cb07f - Revert \Drupal\Tests\rest\Kernel\StubRequestHandlerResourcePlugin
• 25b2dae2 - Revert...
• 8c8086ac - Revert...
• bf85dbec - Revert...
• 104d558e - Fix \Drupal\Tests\Core\ProxyBuilder\ProxyBuilderTest::testBuildComplexMethod

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added 1 commit

• 79a85dfa - Revert changes to additional classes in ProxyBuilderTest

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added 1 commit

• 3a8419ec - Fix testPost methods

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