Measurement of the $$\boldsymbol{e}^{\boldsymbol{+}}\boldsymbol{e}^{\boldsymbol{-}}\boldsymbol{\to}{\pi}^{\boldsymbol{+}}{\pi}^{\mathbf{-}}$$ Cross Section below 1.2 GeV with the CMD-3 Detector at VEPP-2000 Collider