[BUGFIX] Use "pages.target" properly for Pages with External URL

The database field "pages.target" allows to define
a custom target attribute for links in menus of external
URLs.

Before this was (wrongly) built in HMENU but applied
after Typolink worked. This option belongs to the
actual link building when building links to external URLs
where $conf[extTarget] is evaluated.

In addition, HMENU tests now also evaluate "target"
for regular pages as well.

Resolves: #96470
Releases: main, 11.5
Change-Id: I3919b6b13666565687e8ff56dcfc867c871837e2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72866


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>