Add empty chart component

What does this MR do?

Adds an empty state for all queries that don't have enough data, this overrides the current logic, which is hiding queries that have no metrics

Screenshots

Make sure to enable the following feature flags to try this feature locally

Feature.enable(:environment_metrics_use_prometheus_endpoint)
Feature.enable(:environment_metrics_show_multiple_dashboards) <-- optional
Feature.enable(:environment_metrics_additional_panel_types)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Merge request performance guidelines
• Style guides

closes: https://gitlab.com/gitlab-org/gitlab-ce/issues/60947