[TASK] Remove usages of call_user_func() and call_user_func_array()

Using direct calls and variadics is slightly faster, and usually cleaner to read.

I left in the instant-call call_user_func() instances in the entry point files, as
that's only a single call and is arguably at least no worse than (function() {})().

Resolves: #94060
Releases: master
Change-Id: I95988feadf8522d8d936a273608e0ef2d5ce75b5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69017


Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: crell <larry@garfieldtech.com>
Reviewed-by: Benni Mack <benni@typo3.org>