This PR adjusts the logging conditions of clusterLogCantFailover
in this two ways.

1. For the same cant_failover_reason, we will print the log once
in CLUSTER_CANT_FAILOVER_RELOG_PERIOD, but its value is 10s, which
is a bit long, shorten it to 5s, so we can better track its state.

2. We will not print logs before the nolog_fail_time, its value
is cluster-node-timeout+5000. This may casue us to lose some logs,
for example, if cluster-node-timeout is small, auth_timeout will
be 2000, and auth_retry_time will be 4000. In this case, we will
lose all the reasons during the election if the failover is timedout.
So remove the nolog_fail_time logic, since we still do have the
CLUSTER_CANT_FAILOVER_RELOG_PERIOD logic, We won't print too many
logs.

Signed-off-by: Binbin <binloveplay1314@qq.com>

Signed-off-by: Binbin <binloveplay1314@qq.com>