Add tooltip for QS edit button

In order to favor position the tooltip below the button, I needed to adapt the default `PopupPositionProvider` as well as the caret path

Test: manually
Test: EditModeButtonViewModelTest
Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Flag: com.android.systemui.qs_edit_mode_tooltip
Fixes: 403596182
Change-Id: Ibd8c0f0200b6b37db382352ea91b6525efc27af6