- improves consistency with other matchers

- fixes error in CI

- fixes compiler warning (real scalar type)

- used by PETSc find module
- fixes error in CI

- fixes error in CI

- fixes error in CI

- TAO does not support complex scalar type

- adds interface compile definition AE108_PETSC_COMPLEX if complex petsc

- Assembler_Mock has been changed

- x and y are independent

- objective is real-valued