Importing a module and a submodule in the same statement fails in 1.12

[christiangnrd]

MWE:
imp.jl:

module A
    export B
    module B
        export foo
        function foo()
            println("Hello, world!")
        end
    end
end

1.11.3:

X:~/.julia/dev/ObjectiveC$ j --banner=short
  o  | Version 1.11.3 (2025-01-21)
 o o | Official https://julialang.org/ release
julia> include("imp.jl"); using .A, .B

julia> foo()
Hello, world!

master:

X:~/.julia/dev/ObjectiveC$ j +nightly --banner=short
  o  | Version 1.13.0-DEV.23 (2025-02-08)
 o o | Commit dbd52802516 (0 days old master)
julia> include("imp.jl"); using .A, .B
ERROR: UndefVarError: `B` not defined in `Main`
Suggestion: check for spelling errors or missing imports.
Stacktrace:
 [1] top-level scope
   @ REPL[1]:1

In JuliaInterop/ObjectiveC.jl#52, the error even suggests that .Foundation exists as a constant of ObjectiveC.

[vtjnash]

I think we can make using be an implicit latestworld also, since I think that would be the least surprising result here (lowering already inserts that). Or lowering needs to split up the using statement itself so it can add the explicit IR node. Anyone have a particularly strong preference either way?