Skip insert all tests when features are unavailable

These tests are causing the Ruby master build to fail in CI. The Docker
image we use is based on Ubuntu Bionic which provides SQLite 3.22.0, and
the features required to use `insert_all` and `upsert_all` are not
available in that version.

activerecord/test/cases/query_cache_test.rb

@@ -651,6 +651,8 @@ def test_insert
   end
 
   def test_insert_all
+    skip unless supports_insert_on_duplicate_skip?
+
     assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do
       Task.cache { Task.insert({ starting: Time.now }) }
     end
@@ -658,7 +660,9 @@ def test_insert_all
     assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do
       Task.cache { Task.insert_all([{ starting: Time.now }]) }
     end
+  end
 
+  def test_insert_all_bang
     assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do
       Task.cache { Task.insert!({ starting: Time.now }) }
     end
@@ -666,6 +670,10 @@ def test_insert_all
     assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do
       Task.cache { Task.insert_all!([{ starting: Time.now }]) }
     end
+  end
+
+  def test_upsert_all
+    skip unless supports_insert_on_duplicate_update?
 
     assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do
       Task.cache { Task.upsert({ starting: Time.now }) }