[BUGFIX] Type check extbase parameter for array

If an argument on a plugin namespace is not an array,
Extbase failed hard with an type error exception.

Resolves: #91040
Releases: master, 10.4, 9.5
Change-Id: Ib613081aeb99232f1254a431fec57f15bb88b1c0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65351


Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>