feat: update customer groups (#1075)

* update customer service prep

* expand on the update customer groups test case

* add the test case for customer group update

* docs for `groups` prop on update customer endpoint

* refactor, update comments

* expend on integration tests, add customer mock with a group

* refactor to use `customerGroupService.list` method

* update units

* remove `updateCustomerGroups`

* fix rebase conflict

* fix customer seed data, add JoinTable on groups

* group retrieval using the expand param

* fix: use `buildQuery_`

* fix: validation for `groups`, enable `expand`param on update customer endpoint

* fix: remove fileds form the `FilterableCustomerGroupProps`

* fix: spearate body/query validation

Co-authored-by: fPolic <frane@medusajs.com>

integration-tests/api/helpers/customer-seeder.js

@@ -36,8 +36,24 @@ module.exports = async (connection, data = {}) => {
     has_account: true,
   })
 
+  await manager.insert(Customer, {
+    id: "test-customer-5",
+    email: "test5@email.com",
+    groups: [{ id: "test-group-5", name: "test-group-5" }],
+  })
+
   await manager.insert(CustomerGroup, {
     id: "customer-group-1",
     name: "vip-customers",
   })
+
+  await manager.insert(CustomerGroup, {
+    id: "test-group-4",
+    name: "test-group-4",
+  })
+
+  await manager.insert(CustomerGroup, {
+    id: "test-group-5",
+    name: "test-group-5",
+  })
 }