fix inline stats csv test

Author: limotova

x-pack/plugin/esql/qa/testFixtures/src/main/resources/inlinestats.csv-spec

@@ -3950,8 +3950,7 @@ from employees
 
 inlineStatsOnAggregateMetricDouble
 required_capability: inline_stats
-required_capability: aggregate_metric_double_literal_registered
-required_capability: aggregate_metric_double_convert_to
+required_capability: aggregate_metric_double_v0
 FROM k8s-downsampled
 | EVAL a = TO_AGGREGATE_METRIC_DOUBLE(1)     // Temporary workaround to enable aggregate_metric_double
 | INLINE STATS tx_max = MAX(network.eth0.tx) BY pod