generated: Switch resolution module back to what it was before

This addresses post-commit review #57230 (comment).
This change was left-over from before I decided to also change the
type of the `source` argument (at which point `source.module` was
unavailable in the function). This module was supposed to be the
same, but it turns out that both the julia tests and several packages
use this code manually and use different modules for the two places.
Use the same one we used before (which is probably more correct anyway)
to fix #57417

Author: Keno

base/expr.jl

@@ -1694,6 +1694,6 @@ function (g::Core.GeneratedFunctionStub)(world::UInt, source::Method, @nospecial
                          Expr(:meta, :pop_loc))))
     spnames = g.spnames
     return generated_body_to_codeinfo(spnames === Core.svec() ? lam : Expr(Symbol("with-static-parameters"), lam, spnames...),
-        typename(typeof(g.gen)).module,
+        source.module,
         source.isva)
 end

test/staged.jl

@@ -449,3 +449,31 @@ end
 @test first(only(code_typed((Int,Int)) do x, y; @inline overdub54341(x, y); end)) isa Core.CodeInfo
 @test first(only(code_typed((Int,)) do x; @inline overdub54341(x, 1); end)) isa Core.CodeInfo
 @test_throws "Wrong number of arguments" overdub54341(1, 2, 3)
+
+# Test the module resolution scope of generated methods that are type constructors
+module GeneratedScope57417
+    using Test
+    import ..generate_lambda_ex
+    const x = 1
+    struct Generator; end
+    @generated (::Generator)() = :x
+    f(x::Int) = 1
+    module OtherModule
+        import ..f
+        const x = 2
+        @generated f(::Float64) = :x
+    end
+    import .OtherModule: f
+    @test Generator()() == 1
+    @test f(1.0) == 2
+
+    function g_generator(world::UInt, source::Method, _)
+        return generate_lambda_ex(world, source, (:g,), (), :(return x))
+    end
+
+    @eval function g()
+        $(Expr(:meta, :generated, g_generator))
+        $(Expr(:meta, :generated_only))
+    end
+    @test g() == 1
+end