helmChartValues.settings overwritten

When trying to apply a feature gate value, eg; settings.featureGates.spotToSpotConsolidation, the construct currently overwrites any values because it is not doing a deep merge on objects.

https://github.com/aws-samples/cdk-eks-karpenter/blob/main/src/index.ts#L156-L162

and

https://github.com/aws-samples/cdk-eks-karpenter/blob/main/src/index.ts#L197-L199

Start in src/index.ts at lines 156-162 and 197-199, where helmChartValues.settings is assembled. Trace how the feature-gate value is applied and verify that nested existing settings are preserved rather than overwritten. Done means applying settings.featureGates.spotToSpotConsolidation retains other settings values.

Written by the indexing model from the issue text.