gh-126835: Move const list & set folding in for_iter & contains from ast_opt.c to flowgraph.c

[WolframAlph]

• Issue: Move const folding to the peephole optimizer #126835

cc @Eclips4@tomasr8

[iritkatriel]

Yes, this is better.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @iritkatriel for commit eb3abc2 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F30617%2Fmerge

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

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot aarch64 Fedora Stable LTO 3.x has failed when building commit 140e69c.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/336/builds/6345) and take a look at the build logs.
4. Check if the failure is related to this commit (140e69c) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/336/builds/6345

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.lto/build/Lib/threading.py", line 1054, in _bootstrap_innerself.run()
~~~~~~~~^^
File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.lto/build/Lib/threading.py", line 996, in runself._target(*self._args, **self._kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.lto/build/Lib/test/test_interpreters/test_stress.py", line 47, in run
interp = interpreters.create()
File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.lto/build/Lib/test/support/interpreters/__init__.py", line 76, in createid= _interpreters.create(reqrefs=True)
interpreters.InterpreterError: interpreter creation failed
k