Don't delete inferred code from external interpreters (#57224)
We were deleting code from external abstract interpreters since
https://github.com/JuliaLang/julia/commit/bdf8219ee80557ea6035b421b00d91b1174234f2.
Fixes https://github.com/JuliaGPU/CUDA.jl/issues/2637. Not sure how to
write tests for this :(
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Co-authored-by: Jeff Bezanson <jeff.bezanson@gmail.com>
