Merge pull request #100255 from bandersmsft/release-mvc-cost-mgt-billing

cost mgt billing - remove old service folder and redirect

Author: GitHubber17

.openpublishing.redirection.json

@@ -26089,6 +26089,16 @@
             "redirect_url": "https://docs.microsoft.com/rest/api/billing/enterprise/billing-enterprise-api-usage-detail",
             "redirect_document_id": true
         },
+        {
+            "source_path": "articles/billing/index.md",
+            "redirect_url": "/azure/cost-management-billing",
+            "redirect_document_id": false
+        },
+        {
+            "source_path": "articles/cost-management/index.md",
+            "redirect_url": "/azure/cost-management-billing",
+            "redirect_document_id": false
+        },
         {
             "source_path": "articles/cost-management-billing/understand/mca-understand-your-bill.md",
             "redirect_url": "/azure/cost-management-billing/understand/understand/review-customer-agreement-bill",