[#3885] Partially parse when environment variables in schema files ch…

…ange (#4162)

* [#3885] Partially parse when environment variables in schema files
change

* Add documentation for test kwargs

* Add test and fix for schema configs with env_var

automatic commit by git-black, original commits:
  bda70c9
  f344166

core/dbt/utils.py

@@ -228,9 +228,7 @@ def deep_map_render(func: Callable[[Any, Tuple[Union[str, int], ...]], Any], val
         return _deep_map_render(func, value, ())
     except RuntimeError as exc:
         if "maximum recursion depth exceeded" in str(exc):
-            raise dbt.exceptions.RecursionException(
-                'Cycle detected in deep_map_render'
-            )
+            raise dbt.exceptions.RecursionException("Cycle detected in deep_map_render")
         raise