[3.2.x] Refs #31811 -- Corrected DiscoverRunner.setup_databases() signature.
[3.2.x] Refs #31811 -- Corrected DiscoverRunner.setup_databases() signature.

Accidentally changed in 61a0ba43cfd4ff66f51a9d73dcd8ed6f6a6d9915.
Backport of af685b5f00a2a38ec596ff905d5f70455185b6d7 from master

koordinates/django,koordinates/django,wkschwartz/django,koordinates/django,wkschwartz/django,wkschwartz/django,wkschwartz/django,koordinates/django