Template CRD image defaults from values.yaml

Description

• Replace hardcoded default: values for devicePlugin.image, devicePlugin.repository, devicePlugin.version, installer.image, and installer.repository in crd.yaml with Helm template expressions ({{ .Values.* }})
• Add corresponding devicePlugin and installer sections to values.yaml with the same defaults as before

Reasons

CRD schema defaults were previously hardcoded, requiring a chart source edit to change images at deploy time. Now they can be overridden via --set or a custom values.yaml like any other chart value.

Test plan

• helm template . --debug renders CRD with correct defaults from values.yaml
• Override via --set devicePlugin.version=X.Y.Z produces correct default in rendered CRD
• helm install with default values behaves identically to previous chart version

Attachments

https://github.com/kyma-project/gpu-driver/pull/27

Review crd.yaml and values.yaml, then run helm template . --debug to inspect the rendered CRD defaults. Verify that the existing defaults are represented in values.yaml, Helm overrides such as --set devicePlugin.version=X.Y.Z appear in the CRD, and default installation behavior remains unchanged.