Move config out of redundant sync directory

config/core.base_field_override.node.case_study.menu_link.yml

@@ -0,0 +1,20 @@
+uuid: 932d10fa-b0b3-40ed-b557-62ae0207f0bb
+langcode: en
+status: true
+dependencies:
+  config:
+    - node.type.case_study
+id: node.case_study.menu_link
+field_name: menu_link
+entity_type: node
+bundle: case_study
+label: 'Menu link'
+description: 'Computed menu link for the node (only available during node saving).'
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings:
+  handler: default
+  handler_settings: {  }
+field_type: entity_reference