refactor(hsolver): Unify hsolver interface functions to follow hpsi_func pattern

[Cstandardlib]

Describe the Code Quality Issue

All KS solvers (cg,dav,etc.) need hpsi, spsi, preconditioning, etc.
Now each makes a copy of hpsi_func and spsi_func, which can be collected into one.

// source_hsolver/hsolver_pw.cpp
// hpsi_func (X, HX, ld, nvec) -> HX = H(X), X and HX blockvectors of size ld x nvec
        auto hpsi_func = [hm, cur_nbasis](T* psi_in, T* hpsi_out, const int ld_psi, const int nvec) {

            // Convert "pointer data stucture" to a psi::Psi object
            auto psi_iter_wrapper = psi::Psi<T, Device>(psi_in, 1, nvec, ld_psi, cur_nbasis);

            psi::Range bands_range(true, 0, 0, nvec - 1);

            using hpsi_info = typename hamilt::Operator<T, Device>::hpsi_info;
            hpsi_info info(&psi_iter_wrapper, bands_range, hpsi_out);
            hm->ops->hPsi(info);
        };
        bool scf = this->calculation_type == "nscf" ? false : true;

        auto spsi_func = [hm](T* psi_in, T* spsi_out, const int ld_psi, const int nvec) {
            hm->sPsi(psi_in, spsi_out, ld_psi, ld_psi, nvec);
        };

Additional Context

No response

Task list for Issue attackers (only for developers)

• Identify the specific code file or section with the code quality issue.
• Investigate the issue and determine the root cause.
• Research best practices and potential solutions for the identified issue.
• Refactor the code to improve code quality, following the suggested solution.
• Ensure the refactored code adheres to the project's coding standards.
• Test the refactored code to ensure it functions as expected.
• Update any relevant documentation, if necessary.
• Submit a pull request with the refactored code and a description of the changes made.