Allow leader election for scheduler-plugins-controller in Helm chart

[shkrid]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Allow leader election for scheduler-plugins-controller in Helm chart

Does this PR introduce a user-facing change?

NONE

[k8s-ci-robot]

Hi @shkrid. Thanks for your PR.

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[Huang-Wei]

/ok-to-test

[Huang-Wei]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Huang-Wei, shkrid

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• OWNERS [Huang-Wei]

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[Huang-Wei]

/release-note-none