MC-38620: Merge release branch into 2.4-develop

fix tests after merge

Author: zakdma

app/code/Magento/Quote/Observer/Frontend/Quote/Address/CollectTotalsObserver.php

@@ -141,11 +141,9 @@ public function execute(Observer $observer)
             $address->setPrevQuoteCustomerGroupId($quote->getCustomerGroupId());
             $quote->setCustomerGroupId($groupId);
             $this->customerSession->setCustomerGroupId($groupId);
-            if ($customer->getId() !== null) {
-                $customer->setGroupId($groupId);
-                $customer->setEmail($customer->getEmail() ?: $quote->getCustomerEmail());
-                $quote->setCustomer($customer);
-            }
+            $customer->setGroupId($groupId);
+            $customer->setEmail($customer->getEmail() ?: $quote->getCustomerEmail());
+            $quote->setCustomer($customer);
         }
     }
 }