Normalize `types` module usage in `copy` module

[sobolevn]

Right now there are two minor problems with it:

1. Here CodeType is assumed to be missing for some reason:

   cpython/Lib/copy.py

   Line 109 in 26ff436

   t = getattr(types, "CodeType", None)

   But here, it is just used as it should be:

   cpython/Lib/copy.py

   Line 185 in 26ff436

   d[types.CodeType] = _deepcopy_atomic

2. We can also modernize type(None) and etc to use existing types. aliases for clarity

Linked PRs

• gh-100815: Normalize types module usage in copy module #100816