tests: run most tests with dirstate v2
The commit "dirstate-v2: do not put the dirstate data file in a transaction" is duplicated with MR#309.
If the new CI variant is not desired, I'm happy to remove it, but I still want to keep the test tweaks.
This instance will be upgraded to Heptapod 18.0.1 on 2025-07-10 between 14:00 and 15:00 UTC+2
The commit "dirstate-v2: do not put the dirstate data file in a transaction" is duplicated with MR#309.
If the new CI variant is not desired, I'm happy to remove it, but I still want to keep the test tweaks.