Eng 5701 improve websites demo data

[thiemok]

This adds a couple of fixes and improvements for the web monitoring demo data:

• Use multiple tabs when browsing products 50% of the time
• Remove otel-js init to ensure backend correlation works every time
• Improve demo data by basing the random user selection on the same demo data used for the checkout calls. This mainly adds real locations instead of completely random ones
• Add titles to custom events fired in the demo app

[jkempff]

LGTM