ClientPool concurrency issue with PDO. Queried data conflicts.

[Elar Must]

1. What did you do? If possible, provide a simple script for reproducing the error.
   Run large number of mysql queries in parallel inside http server on('request') method.

Step 1:
Create a ClientPool like this.

Step 2:
Create a wrapper function to query data and manage connection:

Step 3:
Run large number of parallel queries. For example, create a basic http server and query the data like this.

Step 4:
Open the website in 2 different browsers at the same time.

2. What did you expect to see?
   Each request receives the correct data. For simple visual data verification, I used PHPSESSID cookie.

3. What did you see instead?

Data is getting mixed up between multiple queries running in parallel.

4. What version of OpenSwoole are you using (show your `php --ri openswoole`)?

official docker image version 22.0.0

5. What is your machine environment used (show your `uname -a` & `php -v` & `gcc -v`) ?

Linux 66d70d353f35 5.15.90.1-microsoft-standard-WSL2 #1 SMP Fri Jan 27 02:56:13 UTC 2023 x86_64 Linux

PHP 8.2.5 (cli) (built: Apr 14 2023 18:00:14) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.2.5, Copyright (c) Zend Technologies

/bin/sh: gcc: not found ????

Additionally, this error is not reproducible when running them in parallel like this:

This issue did not show up when i tried Swoole