Aggregation: Adjust aggregation url params

Created by: vovakulikov

Fixes https://github.com/sourcegraph/sourcegraph/issues/40868

Test plan

• Make sure that URL has new aggregation values
  • REPO → repo
  • PATH → path
  • AUTHOR → author
  • CAPTURE_GROUP → group
• Make sure that when you run aggregation in sidebar panel ULR doesn't have any aggregation UI mode specific query param in URL
• Make sure that when you run aggregatin in the full UI mode URL has expanded= query param

Why expanded has = at the end

WhatWG spec says that query param always should have value (it's basically a key value pair) Since our hook uses URLSearchParams class we have to have a = at the end. We could change this logic and set param manually but working with search strings may be tricky (we can by accident remove something from the URL)

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.