fix(helm): fix global extra* values

[yann-soubeyrand]

What this PR does / why we need it:

The Helm chart has a global section where one can put extraArgs, extraEnv, extraEnvFrom, extraVolumes and extraVolumeMounts configuration. This is working fine for the write component, but it is not working for the read component and extraEnvFrom is not working for the backend component. This PR fixes this.

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[yann-soubeyrand]

Hi @poyzannur, thanks for having merged #16828. Could you have a look at this PR which further fixes extraArgs, extraVolumes and extraVolumeMounts for the read, bloomPlanner and tableManager components?

[poyzannur]

Thanks so much for the fixes @yann-soubeyrand