[TASK] Check for PHP extension PDO

Let the Install Tool check also for PHP extension PDO.
With #85803 the requirement has also been added to the composer.json
files.

Resolves: #88141
Releases: master
Change-Id: I9eb10f71db3d5111362833b3f07f2f687bf0ee69
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63553


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Eßl <indy.essl@gmail.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Eßl <indy.essl@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>