fix: copy url to proposal comment

[petersalomonsen]

The issue is fixed by pointing both events-committee and infrastructure-committee instances to the same CommentsAndLogs.jsx component devhub. The instance-specific versions of this component are deleted. The devhub version now also detects which instance that loaded it. Added an additional test for the like button, since this also now will be loaded via the devhub comments and logs component.

Another issue addressed is that the RFP comment test was still expecting the iframe for the preview, so it is updated to handle that we have switched back to the BOS built-in markdown viewer ( without iframe ).

Here's a reproduction of #956 in a playwright test

And here's the test video after fixing the issue

https://github.com/user-attachments/assets/fcfd3a3f-3934-45bf-9982-b922a42397bf

fixes #956