Fixes for helm chart

[Keramblock]

Motivation and context

When I started to implement helm chart on our k8s I found several forgotten fields and couple minor problem, so here some fixes
closes #3785

How has this been tested?

Tested on our AKS cluster with blob and external psql

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes(No can do)
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,(Not necessary)
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below)

[Keramblock]

Hi @azhavoro, sorry for interrupting, but could you please check this pr? It's pretty straightforward and contains just bug fixes after additional testing in prodlike env.

[nmanovic]

@Keramblock , thanks for the contribution. Could you please add a line about the fix into CHANGELOG.md file?

[nmanovic]

@Keramblock , thanks for your contribution. Your PR was merged with small modifications: #3880