create table with foreign key is slower than normal table

## Enhancement
tidb 16c32g
create table with foreign key:

without foreign key:


table:
```go

var (
TableSQL1 = "CREATE TABLE `%s` (" +
" product_id BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT," +
" product_name VARCHAR(255) NOT NULL," +
" description TEXT," +
" price DECIMAL(10, 2) NOT NULL," +
" stock_quantity INT UNSIGNED NOT NULL," +
" category_id INT UNSIGNED," +
" created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP," +
" updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP" +
");"
TableSQL2 = "CREATE TABLE `%s` (" +
" order_id BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT," +
" customer_id BIGINT UNSIGNED NOT NULL," +
" order_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP," +
" total_amount DECIMAL(10, 2) NOT NULL," +
" shipping_address VARCHAR(255)," +
" order_status ENUM('pending', 'processing', 'shipped', 'delivered', 'cancelled') NOT NULL DEFAULT 'pending'," +
" created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP," +
" updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP" +
");"
TableSQL3 = "CREATE TABLE `%s` (" +
" order_item_id BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT," +
" order_id BIGINT UNSIGNED NOT NULL," +
" product_id BIGINT UNSIGNED NOT NULL," +
" quantity INT UNSIGNED NOT NULL," +
" item_price DECIMAL(10, 2) NOT NULL," +
" created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP," +
" updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP," +
" FOREIGN KEY (order_id) REFERENCES `%s`(order_id)," +
" FOREIGN KEY (product_id) REFERENCES `%s`(product_id)," +
" INDEX idx_order_id (order_id)," +
" INDEX idx_product_id (product_id)" +
");"

DatabaseSQL = "CREATE DATABASE `%s`"
)
```