Updated dimension in .ci.yaml doesn't propagate to task when re-run #104758
Description
Example PR: #104727
The dimension change populated for first try: https://ci.chromium.org/ui/p/flutter/builders/try/Mac_ios%20hot_mode_dev_cycle_macos_target__benchmark/1566/overview
But not in the retry: https://ci.chromium.org/p/flutter/builders/try/Mac_ios%20hot_mode_dev_cycle_macos_target__benchmark/1571
Related issue for properties: #101715