Move historical_data.date column back to original position

The column was accidentally moved in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/45893. Move it
back to its original position since the change is not required, and to
prevent this change from causing diffs in all GDK instances.

db/structure.sql

@@ -12749,10 +12749,10 @@ CREATE TABLE group_wiki_repositories (
 
 CREATE TABLE historical_data (
     id integer NOT NULL,
+    date date,
     active_user_count integer,
     created_at timestamp without time zone,
     updated_at timestamp without time zone,
-    date date,
     recorded_at timestamp with time zone,
     CONSTRAINT check_640e8cf66c CHECK ((recorded_at IS NOT NULL))
 );