Update 3.0.0

/!\ Upgrading to version 3.0.0 will take some time (from a few seconds to a few minutes depending on the question_vplquestion database table size). Please be aware of this, and prefer upgrading from command line rather than web interface.

New features

• Asynchronous evaluations: questions can now be set to be evaluated via adhoc tasks rather than leaving the browser pending.
• Event logging for asynchronous evaluations.
• Each question can set whether VPL submissions should be discarded.
• Execution files can be inherited from VPL more clearly. No need to use "UNUSED" keyword anymore
• Implementation of default values preferences for new questions.

Fixes

• Better error messages, including when VPL grade is not set to Point mode.
• Fix right panel not being interactable on quizzes with VPL Questions.
• Fix secure connection check for when VPL admin setting for execution server connection is set to "Use ws or wss depending on http or https".
• Fix edition form for Moodle 4.4+.
• Removed some warnings.