[Improvement] [Helm] `bitnami/postgresql` sub chart and default configurations should be upgraded

[icefery]

Search before asking

• I had searched in the issues and found no similar issues.

What happened

For the chart dolphinscheduler-helm-3.1.7, sub chart bitnami/postgresql-10.3.18(default docker images) is incompatible with arm64.

When upgrading the bitnami/postgresql sub chart version, its configurations have changed, in order to get it working, there are some changes:

• Chart.yaml

  dependencies:
  - name: postgresql
    version: 12.7.1
    repository: https://raw.githubusercontent.com/bitnami/charts/archive-full-index/bitnami
    condition: postgresql.enabled

• values.yaml

  postgresql:
    enabled: true
    global:
      postgresql:
        auth:
          postgresPassword: postgres
          username: dolphinscheduler
          password: dolphinscheduler
          database: dolphinscheduler

• templates/_helpers.tpl

  - name: SPRING_DATASOURCE_USERNAME
    {{- if .Values.postgresql.enabled }}
    value: {{ .Values.postgresql.global.postgresql.auth.username }}
    {{- end }}
  - name: SPRING_DATASOURCE_PASSWORD
    valueFrom:
      secretKeyRef:
        {{- if .Values.postgresql.enabled }}
        name: {{ template "dolphinscheduler.postgresql.fullname" . }}
        key: password
        {{- end }}
  {{- end -}}

What you expected to happen

The version of sub charts are newer, and compatible with default Chart.yaml, values.yaml, 'templates/*'.

How to reproduce

See 'What happened'.

Anything else

No response

Version

3.1.x

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

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[github-actions]

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