Two components of the boundary of \(\text \textbf{I}_3\). (Deux composantes du bord de \(\text \textbf{I}_3\)) On polarized 3-folds \((X, L)\) such that \(h^0 < (L)=2\) and the sectional genus of (\(X, L\)) is equal to the irregularity of \(X\) 