Fix race condition in external port check (#4597)

Makes Awaitility ignore exception (which are expected to occur) during checking external ports.

Author: kiview

core/src/main/java/org/testcontainers/containers/wait/strategy/HostPortWaitStrategy.java

@@ -68,6 +68,7 @@ protected void waitUntilReady() {
                         .pollInSameThread()
                         .pollInterval(Duration.ofMillis(100))
                         .pollDelay(Duration.ZERO)
+                        .ignoreExceptions()
                         .forever()
                         .until(externalCheck);