…ytearray (python#131554)add a set of asserts to test.test_capi.test_bytearray1. Assert empty bytearray object for PyByteArray_Check.2. Assert empty bytearray object for PyByteArray_CheckExact.3. Assert 0-size bytearray object for PyByteArray_Size.4. Assert empty bytearray object for PyByteArray_AsString.5. Assert concatenation of the bytearray object with itself for PyByteArray_Concat.(cherry picked from commitf3bf304)