fix(grid): fix out of bounds row index when navigating down from last layout row - 20.1.x#16757

IMinchev64 wants to merge 3 commits into20.1.xIgniteUI/igniteui-angular:20.1.xfrom

iminchev/mrl-out-of-bounds-20.1.xIgniteUI/igniteui-angular:iminchev/mrl-out-of-bounds-20.1.xCopy head branch name to clipboard