[!!!][TASK] Remove global initialization of DateTimePicker fields

The DateTimePicker does no longer initialize
fields, which define the `t3js-datetimepicker`
class, automatically.

This must be done by passing the corresponding
`HTMLInputElement` to `DateTimePicker.initialize()`.

Resolves: #96293
Related: #91606
Releases: main
Change-Id: Ibec038c24fc8205bafd706875b98f900e36eb7c5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72561


Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>