[ie/EuroParlWebstream] Support new URL format

[voidful]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

update regex to support latest link:
latest format: https://multimedia.europarl.europa.eu/en/webstreaming/20240320-1345-SPECIAL-PRESSER
original format: https://multimedia.europarl.europa.eu/en/webstreaming/committee-on-culture-and-education_20230301-1130-COMMITTEE-CULT

Template

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• At least skimmed through contributing guidelines including yt-dlp coding conventions
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• Checked the code with flake8 and ran relevant tests

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What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
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• Core bug fix/improvement
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[bashonly]

changing the formatting makes it very difficult to see what the diff is, and now the line is too long and (?x) is unnecessary. please revert

also, please add a test for the the new url format

[voidful]

Hello @bashonly,

Thank you for your feedback. I understand your concern regarding the updated regular expression format making it difficult to discern the differences.

I'll revert the changes to maintain the original formatting for easier comparison. Additionally, I will ensure to include a test case that covers the new URL format to verify its compatibility and functionality within the extractor.

Best regards.

[seproDev]

I cleaned this up and rewrote the regex. Please check that all URL formats that should be matched are being matched. If there are any I missed, a new test will need to be added.