[TASK] Extract ext:test_irre_foreignfield from ext:irre_tutorial

For easier testing, ext:irre_tutorial "foreignfield" 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: #95952
Releases: master, 11.5
Change-Id: I6fc581ac20821a4dcaff724cef4b3768e7f33dec
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72208
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
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