[3.12] gh-108732: include comprehension locals in frame.f_locals (GH-109026)

[miss-islington]

(cherry picked from commit f2584ea)

Co-authored-by: Carl Meyer [email protected]
Co-authored-by: Radislav Chugunov [email protected]
Co-authored-by: Jelle Zijlstra [email protected]

• Issue: frame.f_locals for list/dict/set comprehension in module/class scope doesn't contain iteration variables #108732

[carljm]

@Yhg1s I think this fix is safe (doesn't touch anything other than frame.f_locals getter), but also the issue is not super-critical, so up to you whether you want to merge this for 3.12.0 or leave it for 3.12.1.

[carljm]

If we are going to do an rc3, then I think this should go into it. It does fix a 3.12 regression, and if the fix does have any unexpected repercussions, it's better to find that out in rc3 than in .1.