Add names to counts_28d group configure metrics

What does this MR do?

Start dogfooding new metric suggestion feaure before releasing it. As a first batch of metric with new automated naming generated use group configure 28d metrics

Appends to metrics YAMLs files was generate with

def append_name_suggestion(glob_path, group)
  Dir.glob(glob_path).each do |path|
    puts path
    definition = File.read(path)
    definition = YAML.safe_load(definition)
    next if definition['product_group'] != group

    File.write(path, "name: \"#{::Gitlab::Usage::Metrics::NamesSuggestions::Generator.generate(definition['key_path']).gsub('"','')}\"\n", mode: 'a')
  end
end

Screenshots (strongly suggested)

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