feat: Serve 10% of tag-page-rendering PROD traffic with ECS

After load testing, we're confident that ECS can serve production traffic.
10% equates to 70-100 requests/minute.

Co-authored-by: connoromalleyatwork <connoromalleyatwork@users.noreply.github.com>

Author: akash1810

dotcom-rendering/cdk/bin/cdk.ts

@@ -185,10 +185,10 @@ export const TagPageRenderingPropsPROD: RenderingCDKStackProps = {
 			},
 		},
 
-		// Route all traffic to EC2
+		// Route 90% traffic to EC2, 10% to ECS
 		targetGroupWeights: {
-			ec2: 1,
-			ecs: 0,
+			ec2: 9,
+			ecs: 1,
 		},
 	},
 };

dotcom-rendering/cdk/lib/__snapshots__/renderingStack.test.ts.snap

@@ -5459,13 +5459,13 @@ exports[`The RenderingCDKStack matches the snapshot for Tag Page Rendering PROD
                   "TargetGroupArn": {
                     "Ref": "TargetGroupTagpagerendering42E428EE",
                   },
-                  "Weight": 1,
+                  "Weight": 9,
                 },
                 {
                   "TargetGroupArn": {
                     "Ref": "TagpagerenderingEcsTargetGroupTagpagerendering0976D2E5",
                   },
-                  "Weight": 0,
+                  "Weight": 1,
                 },
               ],
             },