fix(ec2): don't use inferenceAccellerators in the constructors if not needed (#34618)

### Issue # (if applicable)

Closes #33505 

### Reason for this change

The Ec2TaskDefinition should not pass the `@deprecated` `props.inferenceAccelerators` property if it's  unset or empty, because this results in showing deprecation notices in the console.
See [this comment](#33505 (comment)).

### Description of changes

Do not rely only on passing the props, but check if the array actually contains any elements.

### Describe any new or updated permissions being added




### Description of how you validated changes



Cannot test by hand due to #34610.
UPDATE: manually tested in a production CDK stack. Result as expected, warnings are not shown during `cdk diff`.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: rantoniuk

packages/aws-cdk-lib/aws-ecs/lib/ec2/ec2-task-definition.ts

@@ -143,14 +143,26 @@ export class Ec2TaskDefinition extends TaskDefinition implements IEc2TaskDefinit
    * Constructs a new instance of the Ec2TaskDefinition class.
    */
   constructor(scope: Construct, id: string, props: Ec2TaskDefinitionProps = {}) {
-    super(scope, id, {
-      ...props,
-      compatibility: Compatibility.EC2,
-      placementConstraints: props.placementConstraints,
-      ipcMode: props.ipcMode,
-      pidMode: props.pidMode,
-      inferenceAccelerators: props.inferenceAccelerators,
-    });
+    // don't pass @deprecated inferenceAccelerators if not needed as this renders console warnings
+    if (props.inferenceAccelerators) {
+      super(scope, id, {
+        ...props,
+        compatibility: Compatibility.EC2,
+        placementConstraints: props.placementConstraints,
+        ipcMode: props.ipcMode,
+        pidMode: props.pidMode,
+        inferenceAccelerators: props.inferenceAccelerators,
+      });
+    } else {
+      super(scope, id, {
+        ...props,
+        compatibility: Compatibility.EC2,
+        placementConstraints: props.placementConstraints,
+        ipcMode: props.ipcMode,
+        pidMode: props.pidMode,
+      });
+    }
+
     // Enhanced CDK Analytics Telemetry
     addConstructMetadata(this, props);