feat: add liveness probe on scheduler extender

[JasonHe-WQ]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #353

Special notes for your reviewer:
Test needed

Does this PR introduce a user-facing change?:
Nothing

[lengrongfu]

@JasonHe-WQ Can you add livenessProbe to kube-scheduler container?

    livenessProbe:
      failureThreshold: 8
      httpGet:
        path: /healthz
        port: 10259
        scheme: HTTPS
      initialDelaySeconds: 10
      periodSeconds: 10
      successThreshold: 1
      timeoutSeconds: 15

[JasonHe-WQ]

@JasonHe-WQ Can you add livenessProbe to kube-scheduler container?

    livenessProbe:
      failureThreshold: 8
      httpGet:
        path: /healthz
        port: 10259
        scheme: HTTPS
      initialDelaySeconds: 10
      periodSeconds: 10
      successThreshold: 1
      timeoutSeconds: 15

Done

[lengrongfu]

LGTM~

[wawa0210]

/lgtm
/approve

[hami-robott]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JasonHe-WQ, wawa0210

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