Create a Dashboard to track popularity/page views of the pages analysed by Source Code group in terms of performance
<!--IssueSummary start-->
<details>
<summary>
Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards.
</summary>
- [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=402767)
</details>
<!--IssueSummary end-->
<!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.-->
### Task
While looking at the LCP leaderboard [dashboard](https://dashboards.gitlab.net/d/sftijGFMz/sitespeed-lcp-leaderboard?orgId=1&refresh=5m&var-namespace=sitespeed_io&var-path=desktop&var-testname=gitlab&var-domains=gitlab_com&var-pages=Editor_SingleFile_team_page&var-pages=Editor_Snippet_Dashboard&var-pages=Editor_Snippet_new&var-pages=Editor_Snippets_Explore&var-pages=Editor_Snippets_Markdown&var-pages=Editor_Snippets_Multifile&var-pages=Editor_Snippets_Textual&var-pages=SourceCode_Blob_View_Large&var-pages=SourceCode_Blob_View_Refactor_Disabled&var-pages=SourceCode_Blob_View_Refactor_Enabled&var-pages=SourceCode_Blob_View_Small&var-pages=SourceCode_DeepDirectoryView&var-pages=SourceCode_File_Blame_Large&var-pages=SourceCode_File_Blame_Small&var-pages=SourceCode_HighlightJs__Enabled&var-pages=SourceCode_Repo_Large&var-pages=SourceCode_Repo_Small&var-browser=chrome&var-function=median&var-connectivity=cable), the information regarding page views and popularity among users is missing, preventing us from crossing the highest offenders in terms of LCP timing and the popularity among users.
Would be useful to have such a dashboard created for the benefit of prioritisation of Source Code group work.
# Existing work
Torsten created this, that can be iterated upon if not enough:
https://app.periscopedata.com/app/gitlab/664109/Create:-Source-Code-Dashboard
<!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. -->
<!-- Consider adding related issues and epics to this issue. You can also reference the Feature Proposal Template (https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal%20-%20detailed.md) for additional details to consider adding to this issue. Additionally, as a data oriented organization, when your feature exits planning breakdown, consider adding the `What does success look like, and how can we measure that?` section.
-->
<!-- Label reminders
Use the following resources to find the appropriate labels:
- Use only one tier label choosing the lowest tier this is intended for
- https://gitlab.com/gitlab-org/gitlab/-/labels
- https://about.gitlab.com/handbook/product/categories/features/
-->
issue