Fix race in PSYNC2 partial resync test (#11653)

This test sometimes fails:
```
*** [err]: PSYNC2: Partial resync after Master restart using RDB aux fields with expire in tests/integration/psync2-master-restart.tcl
Expected [status ::redis::redisHandle24 sync_partial_ok] == 1 (context: type eval line 49 cmd {assert {[status $replica sync_partial_ok] == 1}} proc ::test)
```

This is because the default repl-timeout value is 10s, sometimes the test
got timeout, then it will do a reconnect, it will incr the sync_partial_ok
counter, and then cause the test to fail.In this fix, we set the repl-timeout
to a very large number to make sure we won't get the timeout.

tests/integration/psync2-master-restart.tcl

@@ -11,6 +11,13 @@ start_server {} {
 
     set sub_replica [srv -2 client]
 
+    # Because we will test partial resync later, we don’t want a timeout to cause
+    # the master-replica disconnect, then the extra reconnections will break the
+    # sync_partial_ok stat test
+    $master config set repl-timeout 3600
+    $replica config set repl-timeout 3600
+    $sub_replica config set repl-timeout 3600
+
     # Build replication chain
     $replica replicaof $master_host $master_port
     $sub_replica replicaof $replica_host $replica_port