release/v21.03: fix(raftwal): take snapshot after restore (#7719) #7750
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We should propose a snapshot immediately after the restore to prevent the restore from being replayed.
Earlier we were trying to do that too. Snapshot happens after the restore but that does not actually include the restore proposal as it has not been applied yet (n.Applied.Done() is not yet called for that proposal).
Now, we will first wait for the raft entry to be marked as done and then try to propose the snapshot.
(cherry picked from commit 72cebd1)
This change is