IO-1175 Vehicle not required metadata changes.

hasura/migrations/1622495491154_alter_table_public_vehicles_alter_column_v_vin/down.yaml

@@ -0,0 +1,5 @@
+- args:
+    cascade: false
+    read_only: false
+    sql: ALTER TABLE "public"."vehicles" ALTER COLUMN "v_vin" SET NOT NULL;
+  type: run_sql

hasura/migrations/1622495491154_alter_table_public_vehicles_alter_column_v_vin/up.yaml

@@ -0,0 +1,5 @@
+- args:
+    cascade: false
+    read_only: false
+    sql: ALTER TABLE "public"."vehicles" ALTER COLUMN "v_vin" DROP NOT NULL;
+  type: run_sql