also disable `is_foldable` test on other 32bit platforms (#54910)
Follow-on from https://github.com/JuliaLang/julia/pull/54323
@aviatesk I think this should also be disabled on linux? It's been
failing there
On `test i686-linux-gnu`
```
math (7) | failed at 2024-06-23T13:58:26.792
Test Failed at /cache/build/tester-amdci5-8/julialang/julia-buildkite/julia-2d4ef8a238/share/julia/test/math.jl:1607
Expression: Core.Compiler.is_foldable(effects)
Context: effects = (+c,+e,+n,!t,+s,+m,+u,+o)
T = Float64
```
