Add topologySpreadConstraints configuration on pod deployment

[kevin-chheang]

Description

The chart currently allow deployment configuration with affinity, nodeSelector...

In my project, we decide to use topologySpreadConstraints as much as possible.
This chart doesn't handle topologySpreadConstraints.

Proposed Solution

In this file deploy/charts/managed-postgres-operator/templates/deployment.yaml
add

      {{- with .Values.topologySpreadConstraints }}
      topologySpreadConstraints:
        {{- toYaml . | nindent 8 }}
      {{- end }}