DxRouteConsistencyTest::ignoreDynamicPathPartNames regex does not preserve the number of path arguments

Overview

Discovered in 📌 Allow CMS Author to set site's homepage from navigation Postponed trying to get \Drupal\Tests\experience_builder\Unit\DxRouteConsistencyTest::ignoreDynamicPathPartNames() to pass

Proposed resolution

Fix ignoreDynamicPathPartNames() and add code example of its intention

User interface changes