Add test for std::real(std::complex) and std::imag(std::complex)

[SergeyKopienko]

Which functions were tested:

• std::complex<T>::complex - constructor
• std::complex<T>::imag
• std::complex<T>::real
• std::abs(std::complex<T>)
• std::arg(std::complex<T>)
• std::conj(std::complex<T>)
• std::exp(std::complex<T>)
• std::imag(std::complex<T>)
• std::real(std::complex<T>)
• arithmetic functions from https://en.cppreference.com/w/cpp/numeric/complex/operator_arith
• arithmetic functions from https://en.cppreference.com/w/cpp/numeric/complex/operator_arith2
• arithmetic functions from https://en.cppreference.com/w/cpp/numeric/complex/operator_arith3
• functions from https://en.cppreference.com/w/cpp/numeric/complex/operator_cmp
• functions from https://en.cppreference.com/w/cpp/numeric/complex/operator%3D

Where these functions were tested:

• on host;
• in Kernel.

Additional points:

• Added ability to these new tests generate errors from test classes on host and in Kernel (filename, line no, error msg);
• Added ability to these new tests continue current test work after first error and show all errors (on host) and some amount of first errors (in kernel - 3 first errors) which occurred during test run.