feat: add tolerations support

[preko-p]

Summary

• add optional spec.tolerations support to K8sGPT custom resources
• propagate CR tolerations to the managed K8sGPT Deployment pod spec
• add controllerManager.tolerations to the operator Helm chart and render it in the controller-manager Deployment
• update CRD schemas, chart docs, sample config, deepcopy code, and focused deployment scheduling coverage

Fixes #767.

Tests

• go test ./api/v1alpha1 ./pkg/resources
• helm template release chart/operator
• helm template release chart/operator --set 'controllerManager.tolerations[0].key=dedicated' --set 'controllerManager.tolerations[0].operator=Equal' --set 'controllerManager.tolerations[0].value=ai' --set 'controllerManager.tolerations[0].effect=NoSchedule'
• helm lint chart/operator
• git diff --check

make generate and make manifests could not complete in my local macOS environment because the locally built controller-gen binary aborts with dyld: missing LC_UUID load command. The corresponding deepcopy and CRD schema updates are included in this patch.

[linux-foundation-easycla]

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