PY-14765 Quickfix "Add import" handles import groups on its own without PyImportOptimizer

python/testData/addImport/newLastImportInBuiltinGroup/main.after.py

@@ -0,0 +1,6 @@
+import datetime
+import sys
+
+import a
+
+print(datetime, sys, a)

python/testData/addImport/newLastImportInBuiltinGroup/main.py

@@ -0,0 +1,4 @@
+import datetime
+import a
+
+print(datetime, sys, a)