text: Title: [Reporting] Clean up Report Info Flyout file to use imported strings
  Body: The `report_info_flyout_content` has breached a point where it is more convenient for maintainers of the file to source the user-facing content strings from a separate file. 
  
  This issue is to follow the imports added in https://github.com/elastic/kibana/pull/130020/files#diff-83b67268eba04e092077b198cf34a3a7c273878024670feac96ca495fc8d829f to hoist all the user-facing content strings from the external file.