Fix circular dependency condition with `current_application_settings`
`current_application_settings` used by `influx_metrics_enabled` executed a markdown parsing code that was measured using `Gitlab::Metrics.measure` But since the Gitlab::Metrics::InfluxDb was not yet build so Gitlab::Metrics did not yet have `measure` method. Causing the NoMethodError. However If run was successful at least once then result was cached in a file and this code never executed again. Which caused this issue to only show up in CI preparation step.