fix(grid): fix out of bounds row index when navigating down from last layout row - 21.0.x#16756

IMinchev64 wants to merge 3 commits into21.0.xIgniteUI/igniteui-angular:21.0.xfrom

iminchev/mrl-out-of-bounds-21.0.xIgniteUI/igniteui-angular:iminchev/mrl-out-of-bounds-21.0.xCopy head branch name to clipboard