Adding imagepullsecret and pullpolicy for MPS deployment

[visheshtanksale]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The MPS control daemon Deployment did not honor the chart's image pull configuration, so its pod could not pull the driver image from a private registry, and its pull policy was left to the Kubernetes default inferred from
the image tag.

This PR plumbs image pull settings through to the MPS control daemon pod spec:

Which issue(s) this PR is related to:

Fixes #1045

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Two new gpu-kubelet-plugin flags/env vars are added:
`--mps-control-daemon-image-pull-secret-names` /
`MPS_CONTROL_DAEMON_IMAGE_PULL_SECRET_NAMES` and
`--mps-control-daemon-image-pull-policy` /
`MPS_CONTROL_DAEMON_IMAGE_PULL_POLICY`. 
These are set automatically by the Helm chart from existing `imagePullSecrets` and `image.pullPolicy` values; no action
is required on upgrade.

Additional documentation (design docs, usage docs, etc.):

Checklist

• make check test passes locally
• make check-generate passes if api/ changed (CRDs, deepcopy, informers, listers, clientset)
• make check-modules passes if go.mod / go.sum changed
• Tests added or updated for the change
• Helm chart (deployments/helm) updated if flags, RBAC, or defaults changed

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: visheshtanksale
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[shivamerla]

/retest

[k8s-ci-robot]

@visheshtanksale: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-dra-driver-nvidia-gpu-e2e-lambda-gpu	f1d7590	link	false	/test pull-dra-driver-nvidia-gpu-e2e-lambda-gpu
pull-dra-driver-nvidia-gpu-e2e-lambda-gpu-gh200	f1d7590	link	false	/test pull-dra-driver-nvidia-gpu-e2e-lambda-gpu-gh200

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[shivamerla]

Can we generalize these as IMAGE_PULL_POLICY and IMAGE_PULL_SECRETS instead, as they can be used for any non-mps pods that we might manage in the future.

[shivamerla]

Additional field in the config for mpsControlDaemonImagePullPolicy seem unnecessary here.

[k8s-ci-robot]

PR needs rebase.

Details

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