gh-101277: Isolate itertools, part 2/4

[erlend-aasland]

Add dropwhile, takewhile, starmap, combinations*, and permutations types to module state

• Issue: Isolate the itertools extension module #101277

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @corona10 for commit 29a3485 🤖

If you want to schedule another build, you need to add the :hammer: test-with-refleak-buildbots label again.

[corona10]

lgtm!!

[kumaraditya303]

Thanks @erlend-aasland, onto the next one!

[erlend-aasland]

Thanks @erlend-aasland, onto the next one!

Thanks, Kumar! I'm on the road these days; I'll try to find the time to prepare part 3 later today.