Notification Grouping

[Dalje-et]

What does this PR do?

Adds documentation on Notification Grouping with explanation, examples, and guide.

Motivation

n/A

Preview

https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/notify/#notify-your-team

Additional Notes

n/A

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: https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/create/configuration https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/guide/control-the-dimension-you-want-to-be-alerted-on https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/manage/status https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/notify/_index

[github-actions[bot]]

Preview links (active after the build_preview check completes): https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/create/configuration https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/guide/control-the-dimension-you-want-to-be-alerted-on https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/manage/status https://docs-staging.datadoghq.com/daljeet/notification-grouping/monitors/notify/