Resolve #3468299 "Remove dependency to"

Ported the functionalities from VWO module:

• Config install/schema -> New config structure
• User control -> Moved logic to front end (issue #3462305)
• Saved the VWO bootstrap script onto a file
• Using Drupal condition plugins (issue #3462296)
• Added hook_requirements() to check if VWO module is enabled
• Removed dependency to VWO module

Removed unused settings (issue #3468304):

• Settings for timeout
• Settings for jquery library
• Settings for async load

Closes #3468299