CI jank

[tbg]

CI jank

• roachtest: jepsen-batch2/sets/parts-start-kill-2 failed cockroachdb/cockroach#37971 test claims to pass in test.log but CI clearly shows it failed. Similarly roachtest: cdc/initial-scan/rangefeed=true failed cockroachdb/cockroach#37112 (comment)
• link in roachprod-posted issues should go straight to the right place in artifacts (or at least artifacts landing)
• all output for a test should go to a file in artifacts, right now it's very inconsistent. The main output has lots of parallelism so it's generally garbage
• auto-assigner for roachtest issues does random stuff because roachtests don't live in go-style test functions that it knows how to blame
• ssh flakes
• the release branch python issue poster
• saw multiple AWS tests which TC thought passed but which clearly had failing builds in them