Update RUM ownership of views page with rules

[arti-arutiunov]

What does this PR do? What is the motivation?

Merge readiness

• Ready for merge

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Additional notes

[github-actions]

Preview links (active after the build_preview check completes)

New or renamed files

• https://docs-staging.datadoghq.com/Arti-Arutiunov/ownership-of-views-regex/dd_e2e/cdocs/components/stepper_customizable

Modified Files

• https://docs-staging.datadoghq.com/Arti-Arutiunov/ownership-of-views-regex/real_user_monitoring/ownership_of_views

[rtrieu]

Created DOCS-15328

[jhgilbert]

[Automated message] This PR has merge conflicts caused by the recent docs repo reorg (files moved from the repo root into hugo/). A new PR with your commits translated to the correct paths has been opened: #38887

Please follow the instructions in the PR description.

This is an automated comment, but if you have a question, you can mention me in this PR (external contributors) or reach out in #docs-repo-reorg-support on Slack (internal contributors).