fix(overlay use): report errors in export-env (#16184)

- fixes #10242

# Tests + Formatting
Added 2 tests to confirm `use` and `overlay use` report errors in
`export-env` blocks.

---------

Co-authored-by: Bahex <17417311+Bahex@users.noreply.github.com>

crates/nu-command/tests/commands/use_.rs

@@ -354,3 +354,15 @@ fn test_use_with_printing_current_file() {
         assert_eq!(actual.out, dirs.test().join("mod.nu").to_string_lossy());
     });
 }
+
+#[test]
+fn report_errors_in_export_env() {
+    let actual = nu!(r#"
+        module spam {
+            export-env { error make -u {msg: "reported"} }
+        }
+        use spam
+    "#);
+
+    assert!(actual.err.contains("reported"));
+}