Avoid side effects when precompiling find_artifact_dir

With an explicit call to `find_artifact_dir()` we were actually fetching lazy
artifacts during precompilation, which is typically undesired, besides hitting a
bug in Downloads.jl in certain versions of Julia (up to 1.10.4) which causes the
download of the artifact to hang.  Instead, with `Base.precompile` we retain the
caching of native code, without causing extra downloads during precompilation.

Author: giordano

src/wrapper_generators.jl

@@ -18,7 +18,7 @@ macro generate_wrapper_header(src_name)
             end
         end
         if ccall(:jl_generating_output, Cint, ()) == 1
-            find_artifact_dir() # to precompile this into Pkgimage
+            Base.precompile(find_artifact_dir, ()) # to precompile this into Pkgimage
         end
     end)
 end