Unmute DockerTests.test600Interrupt (elastic#111165)

Investigating elastic#111132 and
it seems this test has been muted on `main` for some time. Let's unmute,
to see if this is specific to the 7.17 branch or not.

qa/packaging/src/test/java/org/elasticsearch/packaging/test/DockerTests.java

@@ -1223,7 +1223,6 @@ public void test500Readiness() throws Exception {
         assertTrue(readinessProbe(9399));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/99508")
     public void test600Interrupt() {
         waitForElasticsearch(installation, "elastic", PASSWORD);
         final Result containerLogs = getContainerLogs();