Change Gradle debug preLaunchTask's command and startPattern

[xorye]

When debugging a Gradle Quarkus project using the Debug current Quarkus project command, a new task (that runs the Gradle quarkusDev command) will be created in .vscode/tasks.json if one does not exist already.

The automatically generated task has an incorrect problemMatcher[0].background.beginsPattern.
Instead of ^.*Scanning for projects...*, I suggest ^.*Starting a Gradle Daemon*.

Also, the Gradle commands located in command and windows.command should have the --console=plain flag added to them. This ensures that problemMatcher[0].background.beginsPattern and problemMatcher[0].background.endsPattern can match properly with the command's output.

This is important because if the end pattern fails to match, the debugger will not attach