Added redirection for azps overview page

[mikefrobbins]

PR Summary

Added redirection for azps overview page

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit c95dc6c:

✅ Validation status: passed

File	Status	Preview URL	Details
.openpublishing.redirection.json	✅Succeeded	View (azurermps-6.13.0) View (azurestackps-2.0.2) View (azurestackps-2.0.1) View (azurestackps-1.8.2) View (azurestackps-2.0.0) View (azuredmps-0.9.0-preview) View (azps-10.1.0) View (azps-9.7.1) View (azps-10.0.0) View (azps-0.10.0) View (azuresmps-4.0.0)

For more details, please refer to the build report.

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