Fix gauge type correctly in pipelines metrics. (#18082) (#18087)

(cherry picked from commit 5fb5634)

Co-authored-by: Mashhur <[email protected]>

Author: mergify[bot]

logstash-core/lib/logstash/config/pipelines_info.rb

@@ -73,8 +73,6 @@ def self.format_pipeline_vertex_section_stats(stats, pipeline)
 
        (stats || {}).reduce([]) do |acc, kv|
         plugin_id, plugin_stats = kv
-
-        props = Hash.new {|h, k| h[k] = []}
         next unless plugin_stats
 
         flattened = flatten_metrics(plugin_stats)
@@ -93,7 +91,7 @@ def self.format_pipeline_vertex_section_stats(stats, pipeline)
 
             nested_type = if type_sym == :"counter/long"
                             :long_counters
-                          elsif type_sym == :"gauge/numeric"
+                          elsif type_sym == :"gauge/number"
                             :double_gauges
                           else
                             nil