Pre Kubernetes v1.20, exec livenessprobes `timeoutSeconds` wasn't functional, and defaults to 1 second. The livenessprobe for the scheduler, however, takes longer than 1 second to finish so the scheduler will have consistent livenessprobe failures when running on v1.20.

> Before Kubernetes 1.20, the field timeoutSeconds was not respected for exec probes: probes continued running indefinitely, even past their configured deadline, until a result was returned.

```
...
  Warning  Unhealthy  23s    kubelet            Liveness probe failed:
```

https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#configure-probes

**Kubernetes version**: v1.20.2

**What happened**:

Livenessprobe failures keeps restarting the scheduler due to timing out.

**What you expected to happen**:

Livenessprobe succeeds.

**How to reproduce it**:

Deploy the helm chart on v1.20+ with the default livenessprobe `timeoutSeconds` of 1 and watch the scheduler livenessprobe fail.

chart/tests/test_scheduler.py
]
                            }
                        }
                    },
                    "tolerations": [
                        {"key": "dynamic-pods", "operator": "Equal", "value": "true", "effect": "NoSchedule"}
                    ],
                    "nodeSelector": {"diskType": "ssd"},
                }
            },
            show_only=["templates/scheduler/scheduler-deployment.yaml"],
        )
        assert "Deployment" == jmespath.search("kind", docs[0])
        assert "foo" == jmespath.search(
            "spec.template.spec.affinity.nodeAffinity."
            "requiredDuringSchedulingIgnoredDuringExecution."
            "nodeSelectorTerms[0]."
            "matchExpressions[0]."
            "key",
            docs[0],
        )
        assert "ssd" == jmespath.search(
            "spec.template.spec.nodeSelector.diskType",
            docs[0],
        )
        assert "dynamic-pods" == jmespath.search(
            "spec.template.spec.tolerations[0].key",
            docs[0],
        )