Refactor TestTransaction() so its decoupled from the adapters

ksql_test.go

@@ -2069,6 +2069,21 @@ func QueryChunksTest(
 
 func TestTransaction(t *testing.T) {
 	for _, config := range supportedConfigs {
+		TransactionTest(t,
+			config,
+			func(t *testing.T) (DBAdapter, io.Closer) {
+				db, close := connectDB(t, config)
+				return db, close
+			},
+		)
+	}
+}
+
+func TransactionTest(
+	t *testing.T,
+	config testConfig,
+	newDBAdapter func(t *testing.T) (DBAdapter, io.Closer),
+) {
 	t.Run(config.driver, func(t *testing.T) {
 		t.Run("should query a single row correctly", func(t *testing.T) {
 			err := createTables(config.driver)
@@ -2134,7 +2149,6 @@ func TestTransaction(t *testing.T) {
 			assert.Equal(t, []User{u1, u2}, users)
 		})
 	})
-	}
 }
 
 func TestScanRows(t *testing.T) {