[!!!][TASK] Remove hardly used pagetree related TS options

The following pageTSconfig options are removed:

- options.pageTree.excludeDoktypes
No doktypes are exclueded anymore in search.

- options.pageTree.disableIconLinkToContextmenu
Icon Links are always selected (option had no effect anymore).

- options.pageTree.searchInAlias
Alias is now always searched for.

- options.pageTree.hideFilter
The filter is always shown, this feature should not be available
on a per-user basis.

Resolves: #82919
Releases: master
Change-Id: Ie0031fef9948bf758e880b04662210d74e27688b
Reviewed-on: https://review.typo3.org/54560


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Eugene Kenah Djomo <kdeugene@yahoo.fr>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>