`using` and `import` are broken after julialang/julia#57965

[c42f]

JuliaLang/julia#57965 changed the way that using and import statements are lowered and breaks they way that we currently use eval() in the JuliaLowering runtime code (specifically, if we use @activate JuliaLowering and then do using SomeMod we get a stack overflow 😅)

Luckily, JuliaLang/julia#57965 also provides exactly the right tools we need to fix this. I'll cook up a fix it shouldn't be hard.