[v10.0.x] Alerting: Add file and rule_group query params in request for filtering the res…

[grafanabot]

Backport e6243f7 from #70379

---

What is this feature?
This PR introduces some changes to the RuleViewer page by adding new query parameters for filtering alert rules based on file (namespace) and rule_group. These additions effectively reduce the number of rules loaded on the page, resulting in improved loading times.

Initially, the plan was to incorporate the new rule_name query parameter introduced in this PR. However, to maintain compatibility with existing links to the view and considering the absence of alert names in those links, an alternative approach was necessary.

By introducing the file and rule_group query parameters, we achieve the desired improvements in loading time and enhance the overall performance of the RuleViewer page.

This is only implemented for cloud rules.

Why do we need this feature?

We need to prevent the unnecessary loading of all rules when only one rule is being accessed.

Who is this feature for?

All users.
Which issue(s) does this PR fix?:

This PR fixes partially (FE side) this issue

Special notes for your reviewer:

filterbygroupandfile.mp4

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.