DOCS-3509 Integrating Monitors with Statuspage Guide

[alai97]

What does this PR do?

Adds Integrating Monitors with Statuspage guide with some screenshots.

Motivation

DOCS-3509

Additional Notes

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Reviewer checklist

• [ ] Review the changed files.
• [ ] Review the URLs listed in the Preview section.
• [ ] Check images for PII
• [ ] Review any mentions of "Contact Datadog support" for internal support documentation.

[github-actions[bot]]

Preview links (active after the build_preview check completes)

New or renamed files

• https://docs-staging.datadoghq.com/alai97/integrate-monitors-with-statuspage-guide/monitors/guide/integrate-monitors-with-statuspage

Modified Files

• https://docs-staging.datadoghq.com/alai97/integrate-monitors-with-statuspage-guide/monitors/guide/
• https://docs-staging.datadoghq.com/alai97/integrate-monitors-with-statuspage-guide/synthetics/guide/synthetic-test-monitors

[urseberry]

DOCS-3904