[BUGFIX] Prevent reseting fields in create multiple pages wizard

The "create multiple pages" wizard features the possibility
to dynamically add additional lines, which therefore allows
to create more then five pages at once.

However, since this action updates the html of the container,
previously made inputs got removed whenever additional
lines were added.

This is now fixed by setting corresponding HTML attributes
to store the inputs.

Resolves: #99453
Releases: main, 11.5
Change-Id: I1beb0ba5d891e757da520ce72e02b575c4520c82
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77254


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>