Find in maps can return arrays (#2845)

Author: kddejong

src/cfnlint/template/transforms/_language_extensions.py

@@ -22,7 +22,7 @@
 # initializing size of string
 _N = 7
 
-_SCALAR_TYPES = (str, int, float)
+_SCALAR_TYPES = (str, int, float, bool)
 
 
 class _ResolveError(Exception):
@@ -159,7 +159,7 @@ def _walk(self, item: Any, params: MutableMapping[str, Any], cfn: Any):
                         if map_value is None:
                             continue
                         # if we can resolve it we will return it
-                        if isinstance(map_value, _SCALAR_TYPES):
+                        if isinstance(map_value, tuple([list]) + _SCALAR_TYPES):
                             return map_value
                     except Exception as e:  # pylint: disable=broad-exception-caught
                         # We couldn't resolve the FindInMap so we are going to leave it as it is
@@ -293,7 +293,6 @@ def value(
             params = {}
         t_map = deepcopy(self._map)
         mapping = None
-
         try:
             mapping = cfn.template.get("Mappings", {}).get(
                 t_map[0].value(cfn, params, only_params)