refactor(blooms): Fix and improve build metrics

[salvacorts]

What this PR does / why we need it:

• Remove log line that is too verbose and kinda useless when there are no gaps found for a given FP range.
• Tasks metric
  • Fix to account for errors forwarded from the builder. Moved the metric update to the caller of the function that was updating the metric originally.
  • Set buckets that span up to hours instead of seconds
• Add metric to track time spent in the planning phase

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
• [ ] For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• [ ] 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