Merge #3524

3524: Update the metrics route r=irevoire a=irevoire

Fixes #3523

Make the metrics available by default without a feature flag.
+ Rename the cli-flag to `experimental-enable-metrics`.

Co-authored-by: Tamo <tamo@meilisearch.com>

meilisearch/tests/common/server.rs

@@ -208,8 +208,7 @@ pub fn default_settings(dir: impl AsRef<Path>) -> Opt {
             skip_index_budget: true,
             ..Parser::parse_from(None as Option<&str>)
         },
-        #[cfg(feature = "metrics")]
-        enable_metrics_route: true,
+        experimental_enable_metrics: true,
         ..Parser::parse_from(None as Option<&str>)
     }
 }