bug when calculating KGE/KGEPRIME on 1D pytensor
The calculation of KGE and KGEPRIME on 1D pytensor results in a runtime error. This is why it is not included in the unit tests at the moment (see https://gitlab.irstea.fr/HYCAR-Hydro/evalhyd/evalhyd-python/-/blob/main/tests/test_determinist.py#L51-57).