Made SourceLocation optional (#44241)

Author: mearvind

specification/azureresiliencemanagement/resource-manager/Microsoft.AzureResilienceManagement/AzureResilienceManagement/models/drill/drill.models.tsp

@@ -697,7 +697,8 @@ model ValidateForExecutionProperties {
 
   @doc("Physiscal Source locations from where resources to be failed-over or faulted.")
   @added(Versions.v2026_03_01_preview)
-  sourceLocations: string[];
+  @madeOptional(Versions.v2026_06_01_preview)
+  sourceLocations?: string[];
 }
 
 @doc("Request body of the Validate For Execute Action of Drill.")

specification/azureresiliencemanagement/resource-manager/Microsoft.AzureResilienceManagement/AzureResilienceManagement/preview/2026-06-01-preview/openapi.json

@@ -11016,10 +11016,7 @@
             "type": "string"
           }
         }
-      },
-      "required": [
-        "sourceLocations"
-      ]
+      }
     },
     "ValidateForExecutionRequest": {
       "type": "object",