Go into Sub parameters to resolve foreach values (#2846)

Author: kddejong

src/cfnlint/template/transforms/_language_extensions.py

@@ -150,6 +150,8 @@ def _walk(self, item: Any, params: MutableMapping[str, Any], cfn: Any):
                         )
                         if only_string:
                             return obj[k][0]
+                        if len(v) == 2:
+                            obj[k][1] = self._walk(v[1], params, cfn)
                 elif k == "Fn::FindInMap":
                     try:
                         mapping = _ForEachValueFnFindInMap(get_hash(v), v)

src/cfnlint/template/transforms/transform.py

@@ -49,7 +49,7 @@ def transform(self, cfn: Any):
                 return matches
             cfn.template = template
 
+        LOGGER.info("Transformed template: %s", cfn.template)
         cfn.graph = Graph(cfn)
         cfn.conditions = Conditions(cfn)
-        LOGGER.info("Transformed template: %s", cfn.template)
         return matches