Deprecate expectDeprecation(), use PHPUnit's expectUserDeprecationMessage() instead

Blocked on upstream expectUserDeprecationMessage*() fails when test is run in separate process

https://github.com/sebastianbergmann/phpunit/issues/6102 is fixed upstream, so as soon as a release 11.5.33 hits the road this is actionable again

With PHPUnit 11.5.34, the facade sealed exception no longer shows, but now we need to complete conversion of all tests to use metadata attributes instead of annotations.