fix: add enableInferenceSetController in helm chart config

[andyzhangx]

Reason for Change:

fix: add enableInferenceSetController in helm chart config and this PR also enables enableInferenceSetController in e2e test
this PR also sets InferenceSetTemplate.Resource as optional to support inference pod template in which InstanceType is not required field

Requirements

• added unit tests and e2e tests (if applicable).

Issue Fixed:

Notes for Reviewers:

[kaito-pr-agent]

Title

Add feature flag for InferenceSet controller in Helm chart

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Description

• Added feature flag for InferenceSet controller in Helm chart

• Conditionally include InferenceSet RBAC resources based on feature flag

• Updated e2e test setup to enable new controller

• Modified webhook configuration to respect feature flag

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Changes walkthrough 📝

	Relevant files
Tests	action.yaml Enable InferenceSet controller in e2e tests                            .github/actions/e2e-base-setup/action.yaml Added enableInferenceSetController=true to HELM_INSTALL_EXTRA_ARGS +1/-1
Configuration changes	inferenceset_clusterrole.yaml Make ClusterRole conditional on feature flag                          charts/kaito/workspace/templates/inferenceset_clusterrole.yaml Wrapped entire file in feature flag conditional Added end marker for conditional block +2/-0      inferenceset_clusterrole_binding.yaml Conditionally include ClusterRoleBinding                                  charts/kaito/workspace/templates/inferenceset_clusterrole_binding.yaml Added feature flag conditional wrapper Included end marker for conditional block +2/-0      webhooks.yaml Make InferenceSet webhook conditional                                        charts/kaito/workspace/templates/webhooks.yaml Added conditional for InferenceSet webhook configuration Maintained Workspace webhook without conditional +2/-0      values.yaml Add new feature gate to chart values                                          charts/kaito/workspace/values.yaml Added enableInferenceSetController feature gate Set default value to false +1/-0

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PR Code Suggestions ✨

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Category	Suggestion	Impact
Possible issue	Fix Helm set argument for feature gate The Helm set argument for enableInferenceSetController is missing the featureGates. prefix. This will set a top-level value enableInferenceSetController which is not used by the chart. Instead, it should be set under featureGates to match the chart's structure. .github/actions/e2e-base-setup/action.yaml [234] -HELM_INSTALL_EXTRA_ARGS: "--set featureGates.gatewayAPIInferenceExtension=true,enableInferenceSetController=true" +HELM_INSTALL_EXTRA_ARGS: "--set featureGates.gatewayAPIInferenceExtension=true,featureGates.enableInferenceSetController=true" Suggestion importance[1-10]: 9 __ Why: The missing featureGates. prefix would incorrectly set a top-level value instead of enabling the feature gate, potentially causing the InferenceSet controller to remain disabled during E2E tests.	High

[Fei-Guo]

Later, we can change workspace full e2e to create inferenceset instead of workspace.