Is your feature request related to a problem? Please describe.

When writing code like this...

cpdef bytes tobytes(o):
    return bytes(o)

Cython generates code like this

...
  __pyx_t_1 = __Pyx_PyObject_CallOneArg(((PyObject *)(&PyBytes_Type)), __pyx_v_o); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 4, __pyx_L1_error)
  __Pyx_GOTREF(__pyx_t_1);
...

Compare this to

cpdef str tostr(o):
    return str(o)

...which Cython does optimize to use PyObject_Str with the following

...
  __pyx_t_1 = __Pyx_PyObject_Unicode(__pyx_v_o); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 4, __pyx_L1_error)
  __Pyx_GOTREF(__pyx_t_1);
...

Describe the solution you'd like.

Ideally the same optimization would be extended to bytes(...)

Describe alternatives you've considered.

No response

Additional context

No response