feat(helm): Add block_builder config to helm chart

[WesselAtWork]

What this PR does / why we need it:

Adds block_builder option to the default config in the loki helm chart

Special notes for your reviewer:

What is the relation with the same configuration options in the ingester config?
Should they be related?

i.e. If I set chunk_encoding should they be equal? Will it break something if they differ?

How do I increment the helm version?
Is that something I need to worry about.

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