assert_called_with should require args argument

There are two main reasons why `assert_called_with` should require
`args` argument:

1) If we want to assert that some method should be called and we don't
   need to check with which arguments it should be called then we should use
   `assert_called`.

2) `assert_called_with` without `args` argument doesn't assert anything!
   ```ruby
   assert_called_with(@object, :increment) do
      @object.decrement
   end
   ```
   It causes false assertions in tests that could cause regressions in the project.

I found this bug by working on
[minitest-mock_expectations](https://github.com/bogdanvlviv/minitest-mock_expectations) gem.
This gem is an extension for minitest that provides almost the same method call
assertions.
I was wondering whether you would consider adding "minitest-mock_expectations"
to `rails/rails` instead of private `ActiveSupport::Testing::MethodCallAssertions` module.
If yes, I'll send a patch - a970ecc42c

activerecord/test/cases/tasks/mysql_rake_test.rb

@@ -272,7 +272,7 @@ def setup
 
       def test_db_retrieves_collation
         ActiveRecord::Base.stub(:connection, @connection) do
-          assert_called_with(@connection, :collation) do
+          assert_called(@connection, :collation) do
             ActiveRecord::Tasks::DatabaseTasks.collation @configuration
           end
         end

activesupport/lib/active_support/testing/method_call_assertions.rb

@@ -17,7 +17,7 @@ def assert_called(object, method_name, message = nil, times: 1, returns: nil)
           assert_equal times, times_called, error
         end
 
-        def assert_called_with(object, method_name, args = [], returns: nil)
+        def assert_called_with(object, method_name, args, returns: nil)
           mock = Minitest::Mock.new
 
           if args.all? { |arg| arg.is_a?(Array) }

activesupport/test/cache/behaviors/cache_instrumentation_behavior.rb

@@ -2,7 +2,7 @@
 
 module CacheInstrumentationBehavior
   def test_fetch_multi_uses_write_multi_entries_store_provider_interface
-    assert_called_with(@cache, :write_multi_entries) do
+    assert_called(@cache, :write_multi_entries) do
       @cache.fetch_multi "a", "b", "c" do |key|
         key * 2
       end

activesupport/test/testing/method_call_assertions_test.rb

@@ -60,12 +60,6 @@ def test_assert_called_with_message
     assert_match(/dang it.\nExpected increment/, error.message)
   end
 
-  def test_assert_called_with
-    assert_called_with(@object, :increment) do
-      @object.increment
-    end
-  end
-
   def test_assert_called_with_arguments
     assert_called_with(@object, :<<, [ 2 ]) do
       @object << 2
@@ -88,12 +82,6 @@ def test_assert_called_with_failure
     end
   end
 
-  def test_assert_called_with_returns
-    assert_called_with(@object, :increment, returns: 1) do
-      @object.increment
-    end
-  end
-
   def test_assert_called_with_multiple_expected_arguments
     assert_called_with(@object, :<<, [ [ 1 ], [ 2 ] ]) do
       @object << 1