Improve testing of simulated astronomical calendar invariants
#7075 removes the test for simulated, but your change also removes coverage for all other tests that set iters to values less than 2000, and I don't know if that hides potential issues. Please restore.
Originally posted by @robertbastian in https://github.com/unicode-org/icu4x/pull/7012#discussion_r2428298117
Assessment for 2.1: Does not block milestone since it's pure testing.
I tried to see if I could resolve this and I wasn't quite sure what was going on here. There are a lot of tests floating around and it's not clear what the gaps are.
This is 2.1-non-blocking but I will keep it in the milestone as it is still possible to happen.