[TASK] Get rid of inline JavaScript in new content element wizard

This patch cleans up the NewContentElementController, used
for the "new content element wizard". All inline JavaScript
is removed, in favour of a custom web component and an improved
JavaScript module, handling the two modes (create content
with known colPos and create content while selecting the
desired colPos).

Previously, the wizard was triggered by a t3js-* class.
Since e.g. the fluid based page module related templates
might be overridden in extension code, a fallback layer
is present to still support this way of initialization
in v11.

Due to the necessary refactoring, some related bugs are fixed:

* Accessing the wizard via the context menu now works correctly
* The "saveAndClose" feature is now also respected in case the
  user has to choose the desired colPos
* Using a custom wizard endpoint (mod.newContentElementWizard.override)
  does no longer initialize the TYPO3 related JavaScript, which
  previously led to a JavaScript TypeError
* A duplicated clear "icon" in the elements filter is removed

Resolves: #95277
Resolves: #95375
Resolves: #95376
Releases: master
Change-Id: I6e9b260938c934222e479c1a93c69ba6f27eec4b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71318


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>