Add an end-to-end test to verify the VPA workflow

[shekhar316]

Describe the feature

Add an end-to-end test to verify the VPA workflow by ensuring pods are recreated when resource recommendations are applied. The test should deploy a sample app, apply a VPA, simulate load to trigger recommendations, and confirm that the old pod is terminated and replaced with a new pod using updated resources, while maintaining application functionality.

The E2E test aims to:

• Verify that the VPA correctly applies resource recommendations.
• Confirm that the affected pods are terminated and recreated as part of the workflow.