[TASK] Remove superflous code from `CustomPlatformDriverDecorator`

With #102402 the deprecated `doctrine/event-manager` has been
mitigated by using a global doctrine dbal driver middleware.

Therefore, the driver decorater `CustomPlatformDriverDecorator`
has been added providing a lot of methods to full-fill the
interface requirements.

This change removes unneeded code by extending from the
`\Doctrine\DBAL\Driver\Middleware\AbstractDriverMiddleware`
for the `CustomPlatformDriverDecorator` implementation.

Resolves: #102589
Related: #102402
Releases: main
Change-Id: If34038998e3fca39c3aa369ca10aedcf6cf436ce
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82072


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>