(AWS-EKS): (Support for helm upgrade)

### Describe the feature

support upgrade or install helm chart as an argument to eks.HelmChart

### Use Case

We've a EKS cluster and use CDK to run helm charts and pass values by reading in a yaml and parsing it. However, in some use cases, where we make an update to the yaml values file, the changes do not take into effect when we update the stack.
As a workaround, we currently delete the stack and recreate it with new values.

### Proposed Solution

to have an argument to let either upgrade or install the helm charts
https://helm.sh/docs/helm/helm_upgrade/

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### CDK version used

2.93

### Environment details (OS name and version, etc.)

typescript

Start at the eks.HelmChart entry point and review the Helm upgrade behavior described in the linked Helm documentation, along with how YAML values are passed into the construct. Define how an upgrade-or-install option should affect stack updates, and verify that changed values take effect without deleting and recreating the stack.

Written by the indexing model from the issue text.