Wrong result of phialpha_out.

[ErjieWu]

A index error is introduced in this pr: #6094 , which leads to the wrong result of phialpha_out for deepks_v_delta=2.

Also, the result for v_delta_precalc seems incorrect (deepks_v_delta=1 mismatch deepks_v_delta=2).

[ErjieWu]

The check for v_delta_precalc and orbital precalc is not in unit test now and should be added!

[ErjieWu]

I found the error for deepks_v_delta=1 is introduced in #5812 . The reason for the error is the same as that for deepks_v_delta=2.