By: Greg Pfeil <greg@technomadic.org>
Share one builder between the detection test helpers `all_known_except` and `fully_reported_upgrades_are_compatible` each rebuilt the reported-upgrade vec by iterating `NETWORK_UPGRADES`. Factor the per-branch construction into `reported_upgrade` and the full sweep into `all_known`, and have both call sites use them.
| Time to Start | Worker time | Duration | Time to finish | Idle | |
| Config | 1s | 9s | 9s | 11s | 1s |
| Eval | 9s | 55s | 55s | 1m04s | 0s |
| Build | 24s | 19m14s | 22h34m35s | 22h34m59s | 0s |
| Suite | 1s | 20m19s | 22h34m57s | 22h34m59s | 22h24m57s |