add force_insert_update tests to CI

Author: timgraham

.github/workflows/test-python.yml

@@ -82,6 +82,7 @@ jobs:
  expressions_case
  defer
  defer_regress
+ force_insert_update
  from_db_value
  generic_relations
  generic_relations_regress

django_mongodb/features.py

@@ -126,6 +126,10 @@ class DatabaseFeatures(BaseDatabaseFeatures):
  # subclasses of BaseDatabaseIntrospection may require a get_constraints() method
  "migrations.test_operations.OperationTests.test_add_func_unique_constraint",
  "migrations.test_operations.OperationTests.test_remove_func_unique_constraint",
+ # MongoDB's "duplicate key error" must be raised as IntegrityError, not
+ # DatabaseError.
+ "force_insert_update.tests.ForceInsertInheritanceTests.test_force_insert_diamond_mti",
+ "force_insert_update.tests.ForceTests.test_force_update",
  }
  # $bitAnd, #bitOr, and $bitXor are new in MongoDB 6.3.
  _django_test_expected_failures_bitwise = {