Version selector in our docs is broken

[jannfis]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

The version selector in our official docs is broken, i.e. the drop down is disabled. Users are only able to see the current version's (stable) docs, but not select a previous version or latest docs.

To Reproduce

• Go to https://argo-cd.readthedocs.io/en/stable/
• Click on the version selector drop down at the top of the page
• See nothing happens

Expected behavior

• Docs for supported versions plus latest would be selectable

Screenshots

[christopherwood]

If it helps, the version selector works just fine in Google Chrome ("Version 109.0.5414.74 (Official Build) (64-bit)") on Ubuntu 22.04.
The version selector doesn't work in Firefox ("109.0 (64-bit)") on the same Ubuntu version.

[shuker85]

Chrome 109 on MacOS it gets into the footer

[Aym3nTN]

A weird finding, where it does work there is this "Error: No ad placements found" error that appears twice in the browser console; when it doesn't work that error only appears once. Maybe this observation could be helpful to debug this behavior.

[cjc7373]

The cause of the problem is that readthedocs injects a js called readthedocs-doc-embed.js, which adds the botton in the bottom left, and also adds a event listener to toggle version selector display status.
I searched readthedocs docs and issues and do not find any way to disable this behavior. So a quick fix is to delete our own event listener.

On the other hand, I support we move to github pages as proposed in #11175.