mpl: refactor placeChildren#8216

maliberty merged 11 commits intoThe-OpenROAD-Project:masterThe-OpenROAD-Project/OpenROAD:masterfrom

The-OpenROAD-Project-staging:mpl-refactor-place-childrenThe-OpenROAD-Project-staging/OpenROAD:mpl-refactor-place-childrenCopy head branch name to clipboard