Description:
------------
- Latest or earlier version has this problem.
- My tests version is PHP-master-Git-2021-03-26(Git).
- In php, i use the pdo method: PDO::lastInsertId(), when MySQL table's auto_increment id bigger than int64, eg: 10376293541461622848, the method return a wrong result, is's like return '-8070450532247928768'.
- It's because the `static zend_string *pdo_mysql_last_insert_id(pdo_dbh_t *dbh, const zend_string *name)` use funtion `php_pdo_int64_to_str(int64_t i64)` to convert the mysql api funciton `last_insert_id()`, it should use `uint64_t`.
- In MySQL Reference Manual, `last_insert_id` With no argument, LAST_INSERT_ID() returns a BIGINT UNSIGNED (64-bit), With an argument, LAST_INSERT_ID() returns an unsigned integer. Is'a always greater than zero.

Test script:
---------------
<?php

try {
    // My localhost mysql server, version is 5.7.0
    $dbh = new PDO('mysql:127.0.0.1:33060;dbname=test', 'root', 'secret');
    // In table `foo`, have 2 columns, primary key `id` auto_increment=10376293541461622848, name is a varchar(20)
    $dbh->exec("insert into foo (`name`) values ('bar')");
    echo $dbh->lastInsertId() . PHP_EOL;
} catch( PDOExecption $e ) {
    print "Error!: " . $e->getMessage() . "</br>";
}

Expected result:
----------------
return "10376293541461622849"

Actual result:
--------------
return "-8070450532247928768"