[BUGFIX] Use correct constructor argument for TableDiff

Using the correct datatype "string" instead of a
\Doctrine\DBAL\Schema\Identifier as TableDiff->name prevents exceptions
if another SchemaEventSubscriber is registered.

Releases: master, 8.7
Resolves: #81276
Change-Id: If273a165604ff3149d8e5aba2c0b5ccbdef8102d
Reviewed-on: https://review.typo3.org/52872


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>