[tempo-distributed] add config support for query_backend_after and query_ingesters_until

[jkmdeltek15]

This PR introduces optional configuration support for the query_backend_after and query_ingesters_until settings in the Tempo Helm chart, specifically for the queryFrontend component.

These options allow fine-tuning how the query-frontend component handles querying backends and ingesters, enabling better performance control and customization for advanced use cases.

Changes Introduced

• Added query_backend_after and query_ingesters_until as optional Helm values.
• Updated the queryFrontend config template to conditionally render these values.
• Default behavior is unchanged if the values are not specified.

[CLAassistant]

All committers have signed the CLA.

[sergey-vin]

It can already be done via different ways:

1. both of them can be set via structuredConfig:

tempo-distributed:
  tempo:
    structuredConfig:
      query_frontend:
        metrics:
          query_backend_after: 5m
        search:
          query_ingesters_until: 5m
          query_backend_after: 5m

2. only query_backend_after can be set via queryFrontend.config

tempo-distributed:
  queryFrontend:
    config:
      metrics:
        query_backend_after: 25m

Related docs:

• https://grafana.com/docs/tempo/latest/configuration/network/tls/
• https://grafana.com/docs/tempo/latest/configuration/
• https://github.com/grafana/tempo/blob/main/modules/frontend/config.go