Update RobotFramework to 7.x

[php-coder]

Changelogs:

• 7.0.x
  • https://github.com/robotframework/robotframework/releases/tag/v7.0a1
  • https://github.com/robotframework/robotframework/releases/tag/v7.0a2
  • https://github.com/robotframework/robotframework/releases/tag/v7.0b1
  • https://github.com/robotframework/robotframework/releases/tag/v7.0rc1
  • https://github.com/robotframework/robotframework/releases/tag/v7.0rc2
  • https://github.com/robotframework/robotframework/releases/tag/v7.0rc3
  • https://github.com/robotframework/robotframework/releases/tag/v7.0
  • https://github.com/robotframework/robotframework/releases/tag/v7.0.1rc1
  • https://github.com/robotframework/robotframework/releases/tag/v7.0.1rc2
  • https://github.com/robotframework/robotframework/releases/tag/v7.0.1
• 7.1.x
  • https://github.com/robotframework/robotframework/releases/tag/v7.1rc1
  • https://github.com/robotframework/robotframework/releases/tag/v7.1rc2
  • https://github.com/robotframework/robotframework/releases/tag/v7.1
  • https://github.com/robotframework/robotframework/releases/tag/v7.1.1
• 7.2.x
  • https://github.com/robotframework/robotframework/releases/tag/v7.2b1
  • https://github.com/robotframework/robotframework/releases/tag/v7.2rc1
  • https://github.com/robotframework/robotframework/releases/tag/v7.2
  • https://github.com/robotframework/robotframework/releases/tag/v7.2.1
  • https://github.com/robotframework/robotframework/releases/tag/v7.2.2
• 7.3.x
  • https://github.com/robotframework/robotframework/releases/tag/v7.3rc1
  • https://github.com/robotframework/robotframework/releases/tag/v7.3rc2
  • https://github.com/robotframework/robotframework/releases/tag/v7.3rc3
  • https://github.com/robotframework/robotframework/releases/tag/v7.3
  • https://github.com/robotframework/robotframework/releases/tag/v7.3.1

Blocked by: #1597