[Reviewed] [Gamepads] Add a condition to check if a button was just pressed

[D8H]

Demo

• [Gamepad tester] Update the extension GDevelop-examples#844

Changes

• Add a condition to check if a button was just pressed
• Fix the "Gamepads count" expression
• Fix the "Last pressed button" expression
  • It now returns the last button that fullfil the "button was just pressed" condition instead of a random button that is held.
• Fix "button is released" condition that was very rarely missing inputs
• Avoid some allocations
• Factorize the code
• Remove unnecessary error logs
• Remove paraphrasing comments