gh-99433: Fix doctest failure on MethodWrapperType

[sobolevn]

Looks like it was failing because isroutine now has ismethodwrapper check. While _from_module was not having one. Refs https://github.com/python/cpython/blame/57be5459593bbd09583317ebdafc4d58ae51dbf4/Lib/inspect.py#L509

New test failure without the code change:

======================================================================
FAIL: basics (test.test_doctest.test_DocTestFinder)
Doctest: test.test_doctest.test_DocTestFinder.basics
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/sobolev/Desktop/cpython/Lib/doctest.py", line 2221, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for test.test_doctest.test_DocTestFinder.basics
  File "/Users/sobolev/Desktop/cpython/Lib/test/test_doctest.py", line 437, in basics

----------------------------------------------------------------------
File "/Users/sobolev/Desktop/cpython/Lib/test/test_doctest.py", line 649, in test.test_doctest.test_DocTestFinder.basics
Failed example:
    tests = doctest.DocTestFinder(exclude_empty=False).find(doctest_lineno)
Exception raised:
    Traceback (most recent call last):
      ...
    ValueError: object must be a class or function
----------------------------------------------------------------------

• Issue: doctest fails with <method-wrapper> object on Python 3.11.0 but succeeds on Python 3.10.3 #99433

This would need a backport to 3.11

[sobolevn]

@larryhastings @isidentical you work on inspect quite a lot, maybe you would have time to take a look? :)

[kumaraditya303]

LGTM

[miss-islington]

Thanks @sobolevn for the PR, and @kumaraditya303 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[bedevere-bot]

GH-100620 is a backport of this pull request to the 3.11 branch.