[extractor/europarl] Rewrite extractor to use new api url

[HobbyistDev]

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Description of your pull request and other information

This PR change the api url from vuplay to arbor.nl. This PR rewrite almost all component of the extractor. This PR also get different id from the old api and afaik, there is no way to know how the old id can get or linked. Embed url is not supported anymore because the embed url need js to get processed.

Fixes #6396

Template

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Copilot Summary

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Summary

🔄🔧📺

Update EuropaTVIE extractor to use new API and JSON format, simplify URL pattern, and add live stream support. This improves compatibility and functionality for the europa.eu website.

EuropaTVIE changed
New API and JSON
Live streams in autumn

Walkthrough

• Simplify _VALID_URL pattern and update test cases (link, link)
• Import traverse_obj function from utils module (link)
• Rewrite _real_extract method to use new API and JSON structure (link)
• Update or add test cases for new API and JSON structure (link)