[TASK] Clean up DatabaseConnection::fullQuoteArray

If the parameter $noQuote equals true, the given array can be returned
directly as there isn't anything to do.

Furthermore the AccessibleMock object from the test method can be
converted into a normal mock.

Resolves: #72781
Releases: master
Change-Id: Id58e5809b0f7d7d1c3c2c5908c70891f9e90a811
Reviewed-on: https://review.typo3.org/46038


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>