Force emission of const return functions using new API (#677)

Co-authored-by: Tim Besard <[email protected]>

Author: gbaraldi

src/jlgen.jl

@@ -624,6 +624,9 @@ function compile_method_instance(@nospecialize(job::CompilerJob))
     if VERSION < v"1.12.0-DEV.1667"
         cgparams = (; lookup = Base.unsafe_convert(Ptr{Nothing}, lookup_cb), cgparams... )
     end
+    if VERSION > v"1.13.0-DEV.285"
+        cgparams = (; force_emit_all = true , cgparams...)
+    end
     params = Base.CodegenParams(; cgparams...)
 
     # generate IR