Fix race in replication test (#8679)

Since redis 6.2, redis immediately tries to connect to the master, not
waiting for replication cron.

in the slow freebsd CI, this test failed and master_link_status was
already "up" when INFO was called.

tests/integration/replication.tcl

@@ -196,9 +196,11 @@ start_server {tags {"repl"}} {
         } {master}
 
         test {SLAVEOF should start with link status "down"} {
+            r multi
             r slaveof [srv -1 host] [srv -1 port]
-            s master_link_status
-        } {down}
+            r info replication
+            r exec
+        } {*master_link_status:down*}
 
         test {The role should immediately be changed to "replica"} {
             s role