diag_S_davidson: copy o_diag,o_diag1 to gpu if needed
diag_S_davidson: copy o_diag,o_diag1 to gpu if needed

this fixes a crash when run with .control.verification=2

electronic-structure/sirius,toxa81/sirius,toxa81/sirius,electronic-structure/sirius,electronic-structure/sirius,toxa81/sirius,electronic-structure/sirius,electronic-structure/sirius,toxa81/sirius,toxa81/sirius,electronic-structure/sirius,electronic-structure/sirius,toxa81/sirius