Add (back) the ability to share links to code intel popover locations

Created by: Numbers88s

Add (back) the ability to share links to code intel popover locations

(note from Chris) There's a tiny 🐛 remaining: using browser back/forward to add/remove the ?popover=pinned URL param should also show/hide the popover, but it currently remains hidden. If anyone finds this annoying, we can dig further to and fix it.

Resolves #30698 (closed)

Test plan

Manually tested

App preview:

• Web
• Storybook

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