Changeset 60677

Tests: Move Hello Dolly test data to match new plugin directory structure.

Moves the Hello Dolly test plugin file from tests/phpunit/data/plugins/hello.php to tests/phpunit/data/plugins/hello-dolly/hello.php to match the updated plugin structure in the main codebase.

Fixes failing tests in Tests_Admin_IncludesPlugin that expect the plugin to be located in a hello-dolly directory.

Props jorbin, davidb, afragen.