[issue30152] Reduce the number of imports for argparse

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

functools.wraps() is used in more complex programs. The purpose of this PR is speeding up small scripts that just start, parse arguments, do its fast work (so fast as outputting a help or a version) and exit. Even collections is not used in a half of my scripts.

types needs functools only for coroutine(). Unlikely it is used in old style namespace packages.

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<https://bugs.python.org/issue30152>
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