Symfony version(s) affected: 5.2.0

Description
Class PDOAdapter has hard coded charset for creating cache table (only for mysql). Standard charset is now utf8mb4, but cache table is still utf8.

How to reproduce
Line 141
$sql = "CREATE TABLE $this->table ($this->idCol VARBINARY(255) NOT NULL PRIMARY KEY, $this->dataCol MEDIUMBLOB NOT NULL, $this->lifetimeCol INTEGER UNSIGNED, $this->timeCol INTEGER UNSIGNED NOT NULL) COLLATE utf8_bin, ENGINE = InnoDB";

Possible Solution
Remove 'COLLATE utf8_bin' from code above and let user to set COLLATE during creating PDO connection (via dsn, or $options['db_connection_options'] in constructor of PDOAdapter class? Or change utf8 to utf8mb4?

It is in the code from first commit until now.