Add metric operation to generic and redis_hll metrics

lib/gitlab/usage/metrics/instrumentations/database_metric.rb

-1# frozen_string_literal: true
+# frozen_string_literal: true
 
 module Gitlab
   module Usage
@@ -55,10 +55,6 @@ module Gitlab
             )
           end
 
-          def relation
-            self.class.metric_relation.call.where(time_constraints)
-          end
-
           private
 
           def relation

lib/gitlab/usage/metrics/instrumentations/generic_metric.rb

@@ -13,6 +13,9 @@ module Gitlab
           #   end
           # end
           class << self
+            attr_reader :metric_operation
+            @metric_operation = :alt
+
             def value(&block)
               @metric_value = block
             end
@@ -28,9 +31,7 @@ module Gitlab
 
           def suggested_name
             Gitlab::Usage::Metrics::NameSuggestion.for(
-              :alt,
-              relation: nil,
-              column: nil
+              self.class.metric_operation
             )
           end
         end

lib/gitlab/usage/metrics/instrumentations/redis_hll_metric.rb

@@ -12,6 +12,11 @@ module Gitlab
           #   events:
           #     - g_analytics_valuestream
           # end
+          class << self
+            attr_reader :metric_operation
+            @metric_operation = :redis
+          end
+
           def initialize(time_frame:, options: {})
             super
 
@@ -32,9 +37,7 @@ module Gitlab
 
           def suggested_name
             Gitlab::Usage::Metrics::NameSuggestion.for(
-              :redis,
-              relation: nil,
-              column: nil
+              self.class.metric_operation
             )
           end