Docs: Add YouTube to the Apache website.

[bitsondatadev]

https://www.youtube.com/@ApacheIceberg

Add a button on the top, as well as, update the Talks page to be embedded playlists from the YouTube channel.

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[github-actions]

This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'

[bitsondatadev]

This was completed with the new documentation site #9520 #8659