tests: Add missing tests for builtins, and many other things.

tests/basics/builtin_chr.py

tests/basics/builtin_compile.py

tests/basics/builtin_dir.py

tests/basics/builtin_divmod.py

tests/basics/builtin_minmax.py

tests/basics/builtin_ord.py

tests/basics/builtin_pow.py

tests/basics/builtin_property.py

tests/basics/builtin_slice.py

tests/basics/builtin_sorted.py

tests/basics/class_descriptor.py

tests/basics/fun_error.py

tests/basics/int_big_mul.py

tests/basics/module1.py

tests/basics/module2.py

tests/basics/module2.py.exp

tests/basics/object1.py

tests/basics/op_error.py

tests/basics/string1.py

tests/basics/sys1.py