create multiple cursor will cause panic

[YangKeao]

Bug Report

ref: #39148 (comment)

1. Minimal reproduce step (Required)

Run with mysql-connector-java:

public class Example {
    public static void main(String[] args) throws SQLException, InterruptedException {
        Connection conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:4000/test?useCursorFetch=true&useServerPrepStmts=true&useSSL=false", "root", "");

        conn.setAutoCommit(false); // must set

        conn.prepareStatement("drop table if exists t").execute();
        conn.prepareStatement("create table t (id int auto_increment primary key, id_2 int)").execute();
        conn.prepareStatement("insert into t values (1,1)").execute();
        conn.prepareStatement("insert into t values (2,2)").execute();

        // submit a statement with more arguments:
        PreparedStatement statement1 = conn.prepareStatement("" +
                "select * " +
                "from " +
                "t " +
                "where id = ? and id_2 = ?");
        statement1.setFetchSize(500);
        statement1.setInt(1, 1);
        statement1.setInt(2, 2);
        ResultSet rs_1 = statement1.executeQuery();

        // submit a statement with less arguments:
        PreparedStatement statement2 = conn.prepareStatement("" +
                "select * " +
                "from " +
                "t " +
                "where (id = ?)");
        statement2.setFetchSize(500);
        statement2.setInt(1, 1);
        ResultSet rs_2 = statement2.executeQuery();

        // fetch the result from the first argument
        while (rs_1.next()) {
            int result = rs_1.getInt(1);

            System.out.println(result);
        }

        conn.close();

    }
}

2. What did you expect to see? (Required)

Returns error, or print the result 1.

3. What did you see instead (Required)

tidb server panic.

4. What is your TiDB version? (Required)

Tested with master and 6.3

I'm afraid any existing version of TiDB has this problem.

[tiancaiamao]

A related PR #40023
@YangKeao