fix: use basepath for group in URL for tests

[mfranzke]

Proposed changes

Due to the work on PR #5387 we've encountered some pipeline runs that ended up running very long into timeouts. To prevent those we should add the correct category part of the component to the test URLs from the very beginning.

Types of changes

• Bugfix (non-breaking change that fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improvements to existing components or architectural decisions)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Further comments

🔭🐙🐈 Test this branch here: https://design-system.deutschebahn.com/core-web/review/fix-use-basepath-for-group-in-URL-for-tests

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Pull request overview

This PR fixes a bug in the Patternhub test file where test URLs were missing the component group/category path segment. The tests now correctly use the dynamic group.path value instead of a hardcoded ./components/ prefix.

• Changes the URL construction in tests to include the full group path from the components.json data structure
• Ensures test URLs match the actual routing structure (e.g., /components/action/button/... instead of /components/button/...)