This restores the behavior that existed prior to #16235 for setting
OOMKilled, while retaining the additional benefits it introduced around
emitting the oom event.
This also adds a test for the most obvious OOM cases which would have
caught this regression.
Fixes#18510
Signed-off-by: Euan <euank@amazon.com>
Upstream-commit: 0b5131444df83eb1e9fe4cfc6bfbf85314e089dc
Component: engine
014b9947c4