GameServerRestartBeforeReadyCrash: Run serially (#2791)
GameServerRestartBeforeReadyCrash: Run serially (#2791)

Narrow the race in #2445 by running GameServerRestartBeforeReadyCrash serially. See https://github.com/googleforgames/agones/issues/2445#issuecomment-1302385202 for a detailed analysis.

Does not fix the issue - this is stopgap until we understand how to fix it.
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