Improve dupsigs test stability
While I wasn't able to find out the root cause of the behavior described in #3665 (comment 327854), I believe it might be caused due to some CI-specific conditions. This MR should lighten the CI load during the dupsigs test and make it more stable.
Closes #3665 (closed)
I ran these changes in CI on main
, v9_18
and executed the dupsigs test in a loop. I haven't seen the issue in any of these runs.