mute failing filerealm hash caching tests (#42304)

some tests are failing after the introduction of #41792.

relates #42267 and #42289.

Author: talevy

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/file/FileRealmTests.java

@@ -90,6 +90,7 @@ private RealmConfig getRealmConfig(Settings settings) {
         return new RealmConfig(REALM_IDENTIFIER, settings, TestEnvironment.newEnvironment(settings), threadContext);
     }
 
+    @AwaitsFix(bugUrl="https://github.com/elastic/elasticsearch/issues/42267")
     public void testAuthenticateCaching() throws Exception {
         Settings settings = Settings.builder()
             .put(RealmSettings.realmSettingPrefix(REALM_IDENTIFIER) + "cache.hash_algo",

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/support/CachingUsernamePasswordRealmTests.java

@@ -64,6 +64,7 @@ public void stop() {
         }
     }
 
+    @AwaitsFix(bugUrl="https://github.com/elastic/elasticsearch/issues/42267")
     public void testCacheSettings() {
         String cachingHashAlgo = Hasher.values()[randomIntBetween(0, Hasher.values().length - 1)].name().toLowerCase(Locale.ROOT);
         int maxUsers = randomIntBetween(10, 100);