Move task to middle when dragging up in grid only overview

When dragging up, TaskView should be in the middle of the screen if grid only overview is enabled.
The pivot and translation of current task and other tasks are changed to move it to the middle.

Bug: 291880228
Test: TaplTestsQuickstep#testBackground
Test: Manual Test, swipe up to go from  app to overview, app launch for live/non-live, split screen as live/non-live task. Test the same scenario in 3P Launcher
Flag: enableGridOnlyOverview
Change-Id: I297119283771ef70c916c63f799552656d767661