For T166010: The Great Namespaceization Effort all classes in MediaWiki should be namespaced, find a new namespace for ´StatusValue` (like \Wikimedia\StatusValue\StatusValue).

• Verify the new namespace is the correct namespace
• Change phan-taint-check
• Release phan-taint-check
• Release mediawiki-phan-config
• Update mediawiki-phan-config everywhere
• Add namespace to the class and class alias, remove the exclude of this class from AutoLoaderTest::CLASS_NO_NAMESPACES (ref 41a1ce7d86)
• Add use statement where the class is used

Extra info: T321806#11406952