[bugfix] Fix a panic in reaping unhealthy nodes
[deps] Merge upstream into fork
[deps] Update the dockerfile for governor from 1.19 to 1.21
[deps] Dependency updates for governor
[enhancement] Add a flag to randomize the order of reaps in the case that some nodes are unreapable for a short period of time.
[enhancement] Handle the case where governor attempts to reap the node it is scheduled on