[TASK] Use inject methods instead of "inject" base test method

There are numereous places where reflection is used
in our test cases to inject dependencies, however
there are methods available doing so, so the tests
can be adapted, which will speed up tests.

In addition, the $callInaccessibleMethod() function
is also replaced by the accessible mock functionality,
resulting in faster results than reflection.

Resolves: #89824
Releases: master
Change-Id: Ia2fc8a8ee4d3b5fc7b0d2de8759a7e5e9ceb7b87
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62503


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>