fix(o11y): fixing lables for chain abstraction Grafana panels (#928)

Author: geekbrother

terraform/monitoring/panels/chain_abstraction/gas_estimation.libsonnet

@@ -10,10 +10,14 @@ local targets   = grafana.targets;
       title       = 'Gas estimations',
       datasource  = ds.prometheus,
     )
-    .configure(defaults.configuration.timeseries)
+    .configure(
+      defaults.configuration.timeseries
+      .withSpanNulls(true)
+    )
     .addTarget(targets.prometheus(
       datasource    = ds.prometheus,
       expr          = 'sum by(chain_id) (rate(gas_estimation_sum[$__rate_interval])) / sum by(chain_id) (rate(gas_estimation_count[$__rate_interval]))',
-      legendFormat  = 'Gas estimation',
+      exemplar      = false,
+      legendFormat  = '__auto',
     ))
 }

terraform/monitoring/panels/chain_abstraction/insufficient_funds.libsonnet

@@ -14,6 +14,7 @@ local targets   = grafana.targets;
     .addTarget(targets.prometheus(
       datasource    = ds.prometheus,
       expr          = 'sum(increase(ca_insufficient_funds_total{}[$__rate_interval]))',
+      exemplar      = false,
       legendFormat  = 'Insufficient funds responses counter',
     ))
 }

terraform/monitoring/panels/chain_abstraction/no_bridging.libsonnet

@@ -14,6 +14,7 @@ local targets   = grafana.targets;
     .addTarget(targets.prometheus(
       datasource    = ds.prometheus,
       expr          = 'sum by(type) (increase(ca_no_bridging_needed_total{}[$__rate_interval]))',
-      legendFormat  = 'No bridging needed responses counter',
+      exemplar      = false,
+      legendFormat  = '__auto',
     ))
 }

terraform/monitoring/panels/chain_abstraction/no_routes.libsonnet

@@ -14,6 +14,7 @@ local targets   = grafana.targets;
     .addTarget(targets.prometheus(
       datasource    = ds.prometheus,
       expr          = 'sum by(route) (increase(ca_no_routes_found_total{}[$__rate_interval]))',
-      legendFormat  = 'No routes responses counter',
+      exemplar      = false,
+      legendFormat  = '__auto',
     ))
 }