[TASK] Extract ext:test_irre_csv from ext:irre_tutorial

For easier testing, ext:irre_tutorial "csv" setup
is extracted to a dedicated extension.
Tests concerning these tables can now load the smaller
test extension, which reduces system load and simplifies
maintenance.

Resolves: #95951
Releases: master
Change-Id: Ib2040107929d795dd5b2606bff170a23435e541a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72165


Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>