fix(eks): cluster.addHelmChart ignores skipCrds (#31832)

### Issue # (if applicable)

Closes #31831.

### Reason for this change

The `kubectl` custom resource lambda was not correctly passing the `skipCrds` parameter of `aws_eks.Cluster.addHelmChart` all the way through to the invocation of `helm`. As such, unexpected behaviour was observed where, even if `skipCrds` was `true`, `helm` running within the lambda would still attempt to install any relevant CRDs as part of the chart.

### Description of changes

Adds the `skip_crds` argument to the call to `helm` within the `helm_handler` function.

### Description of how you validated changes

I've run the unit tests and verified no changes. I cannot run the integration tests as I cannot afford the cost of deploying a full EKS cluster into my personal AWS account and I can't link this PR to our org's GitHub as per your guidelines, so I can't deploy into an account our org owns through CI.

### 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: dancmeyers

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-helm-asset.js.snapshot/asset.93d96d34e0d3cd20eb082652b91012b131bdc34fcf2bc16eb4170e04772fddb1.zip

@@ -1346,7 +1346,7 @@
        {
         "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
        },
-       "/34c4071c4ef1788c4cb0f9a1b7ec53338fb326bb2b24156cc7b95b3e97d17d0d.json"
+       "/285073efff3c8021a1ececafc59702c37ccd5cdc1282f1cfdefe07aca8f379c8.json"
       ]
      ]
     }

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-helm-asset.js.snapshot/asset.fba306965da4b2680dd8b4e6916610efe237162f913f22b10146f647b3f6bce4/apply/__init__.py renamed to packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-helm-asset.js.snapshot/asset.96b83d7c7535f7e731e0679249de9470f417342331b121e36664078b4ef4a11b/apply/__init__.py

@@ -7,7 +7,7 @@
      "S3Bucket": {
       "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
      },
-     "S3Key": "fba306965da4b2680dd8b4e6916610efe237162f913f22b10146f647b3f6bce4.zip"
+     "S3Key": "96b83d7c7535f7e731e0679249de9470f417342331b121e36664078b4ef4a11b.zip"
     },
     "Description": "onEvent handler for EKS kubectl resource provider",
     "Environment": {

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-helm-asset.js.snapshot/asset.fba306965da4b2680dd8b4e6916610efe237162f913f22b10146f647b3f6bce4/get/__init__.py renamed to packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-helm-asset.js.snapshot/asset.96b83d7c7535f7e731e0679249de9470f417342331b121e36664078b4ef4a11b/get/__init__.py

@@ -91,7 +91,7 @@ def helm_handler(event, context):
             chart_dir = get_chart_from_oci(tmpdir.name, repository, version)
             chart = chart_dir
 
-        helm('upgrade', release, chart, repository, values_file, namespace, version, wait, timeout, create_namespace, atomic=atomic)
+        helm('upgrade', release, chart, repository, values_file, namespace, version, wait, timeout, create_namespace, skip_crds, atomic=atomic)
     elif request_type == "Delete":
         try:
             helm('uninstall', release, namespace=namespace, wait=wait, timeout=timeout)