Added a variable for adding GPU Operator Namespace Labels

[MaggieXJZhang]

This MR creates a new variable called gpu_operator_namespace_labels which allows user to add any additional labels they want to add on the GPU operator namespace.

Without this, any changes to the GPU operator namespace labels can easily be overwritten by Terraform commands.

[ikatz-nvidia]

LGTM

[evberrypi]

Should we instead use the GPU operator value daemonsets.labels?
https://github.com/NVIDIA/gpu-operator/blob/73d41d465188543f3ba093889b728e50564e74c7/deployments/gpu-operator/values.yaml#L28C5-L28C5

[MaggieXJZhang]

Should we instead use the GPU operator value daemonsets.labels? https://github.com/NVIDIA/gpu-operator/blob/73d41d465188543f3ba093889b728e50564e74c7/deployments/gpu-operator/values.yaml#L28C5-L28C5

@evberrypi The link you have is labeling the Daemonset, what we need is the label on the GPU Operator namespace, which the GPU operator helm chart does not control, and is instead controlled by TF here. Please review again.

[evberrypi]

Seems fine.