Daily Report: Known test regressions report subsection

[Crola1702]

Description

This PR adds the "Test regressions known" subsection defined in: #57 (comment)

Changes

• Add new method in lib/buildfarm_tools.rb to get open known issues (known issues with an issue that is still open)
• Add new method in lib/report_formatter.rb to get the project (i.e., ros, gazebo) from the name of a job.
• Format open known issues by creating a table of | GH issue | Jobs | Errors | for ros and gazebo
  • This is a milestone to have the exact open issues for ROS and Gazebo each day, so we can track daily which issues are opened
• Restore filter_known flag in generate_report.rb, as now the open issues are reported in this section, and open issues create noise in the urgent section

Examples:

• buildfarm-report_2024-08-05_15-48.json
• 📜 report.md

[Blast545]

LGTM, nit questions