Allow "export-env" parsing in modules (#6382)

* Allow "export-env" parsing in modules

* Fmt

* Add test for importing module's environment

tests/parsing/mod.rs

@@ -151,3 +151,23 @@ fn parse_file_relative_to_parsed_file_dont_use_cwd_2() {
         assert!(actual.err.contains("File not found"));
     })
 }
+
+#[test]
+fn parse_export_env_in_module() {
+    let actual = nu!(cwd: "tests/parsing/samples",
+        r#"
+            module spam { export-env { } }
+        "#);
+
+    assert!(actual.err.is_empty());
+}
+
+#[test]
+fn parse_export_env_missing_block() {
+    let actual = nu!(cwd: "tests/parsing/samples",
+        r#"
+            module spam { export-env }
+        "#);
+
+    assert!(actual.err.contains("missing block"));
+}