[Test] Fix test for api_key enabled (elastic#78163)

Since elastic#76801, the API Key feature is enabled by default and no longer
ties to HTTPS setting. This PR fixes the test to reflect the new
default.

Resolves: elastic#78162

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/SecurityInfoTransportActionTests.java

@@ -117,7 +117,7 @@ public void testUsage() throws Exception {
             apiKeyServiceEnabled = randomBoolean();
             settings.put("xpack.security.authc.api_key.enabled", apiKeyServiceEnabled);
         } else {
-            apiKeyServiceEnabled = httpSSLEnabled;
+            apiKeyServiceEnabled = true; // this is the default
         }
 
         final boolean auditingEnabled = randomBoolean();