Fix 'object has no attribute additional_builtins' (#6410)

Closes #6408

ChangeLog

@@ -20,6 +20,9 @@ What's New in Pylint 2.13.7?
 ============================
 Release date: TBA
 
+* Fix a crash caused by using the new config from 2.14.0 in 2.13.x code.
+
+  Closes #6408
 
 
 What's New in Pylint 2.13.6?

doc/release.md

@@ -71,7 +71,8 @@ cherry-picked on the maintenance branch.
 - Bump the version and release by using `tbump X.Y-1.Z --no-push`. (For example:
   `tbump 2.3.5 --no-push`)
 - Check the result visually with `git show`.
-- Push the tag.
+- Open a merge request to run the CI tests for this branch
+- Create and push the tag.
 - Release the version on GitHub with the same name as the tag and copy and paste the
   appropriate changelog in the description. This triggers the PyPI release.
 - Merge the `maintenance/X.Y.x` branch on the main branch. The main branch should have

pylint/checkers/variables.py

@@ -2069,9 +2069,7 @@ def _is_only_type_assignment(
         if not isinstance(defstmt, nodes.AnnAssign) or defstmt.value:
             return False
 
-        if node.name in self.linter.config.additional_builtins or utils.is_builtin(
-            node.name
-        ):
+        if node.name in self.config.additional_builtins or utils.is_builtin(node.name):
             return False
 
         defstmt_frame = defstmt.frame(future=True)