Migrate additionalEnv to dedicated attributes for third parties components

[mautini]

This MR changes the way the third parties components (minio, clickhouse, etc...) are configured. It remove the use of the additionalEnv property and move the configuration to dedicated properties in Values.yaml (langfuse.minio, langfuse.clickhouse etc...)

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Important

Refactor third-party component configuration in Langfuse Helm chart to use dedicated properties in values.yaml, updating templates and adding secret management for external deployments.

• Configuration Changes:
  • Refactor configuration of third-party components (MinIO, ClickHouse, etc.) from additionalEnv to dedicated properties in values.yaml.
  • Update values.yaml to include new properties for minio, clickhouse, valkey, and postgresql.
• Template Updates:
  • Modify deployment-web.yaml and deployment-worker.yaml to use new configuration properties for environment variables.
  • Add secret templates clickhouse-secret.yaml and minio-secret.yaml for external deployments.
  • Update _helpers.tpl to define new helper functions for generating hostnames and secret names.
• Miscellaneous:
  • Bump chart version in Chart.yaml from 0.12.1 to 0.13.0.
  • Minor formatting fix in README.md.

^{This description was created by for f7d92b5. It will automatically update as commits are pushed.}

[CLAassistant]

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