Resolve "Deprecations page and filters"

What does this MR do and why?

This MR adds deprecation filter in deprecations page. It makes an API call to deprecations yaml which returns a yaml breakdown of all the deprecated versions along with their dates which are then used to filter using dropdown.

Screenshots, screen recordings, or links to review app

SHOW ALL OPTION:

SPECIFIC VERSION SELECTION:

SPECIFIC VERSION WITHOUT DATE

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Configure a local GitLab Docs environment: https://gitlab.com/gitlab-org/technical-writing-group/gitlab-docs-hugo/-/blob/main/doc/setup.md.
2. Go to site http://localhost:1313/update/deprecations/.
3. Filter based on screenshot scenarios above.
4. Make sure UI matches to prod site.

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this merge request.

Closes #28 (closed)