Update grape lograge to return ints when passed

lib/gitlab/grape_logging/formatters/lograge_with_timestamp.rb

@@ -42,7 +42,7 @@ module Gitlab
           when String
             encode_utf8(data)
           when Integer
-            utf8_encode_values(data.to_s)
+            data
           end
         end
       end

spec/lib/gitlab/grape_logging/formatters/lograge_with_timestamp_spec.rb

@@ -46,7 +46,7 @@ RSpec.describe Gitlab::GrapeLogging::Formatters::LogrageWithTimestamp do
     expect(params).to eq([
       { 'key' => 'description', 'value' => '[FILTERED]' },
       { 'key' => 'name', 'value' => 'gitlab test' },
-      { 'key' => 'int', 'value' => '42' }
+      { 'key' => 'int', 'value' => 42 }
     ])
   end
 end