[ML] Unmute MLModelDeploymentFullClusterRestartIT.testDeploymentSurvivesRestart (#115060)

After several hundreds of iterations of

```
./gradlew ":x-pack:qa:full-cluster-restart:v8.0.1#bwcTest" -Dtests.class="org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT" -Dtests.method="testDeploymentSurvivesRestart" -Dtests.seed=A7BE2CA36E251E1E -Dtests.bwc=true -Dtests.locale=af-ZA -Dtests.timezone=Antarctica/South_Pole -Druntime.java=22
```

No failures were observed.

Given the location of the failure mentioned in #112980 it was likely due to a timeout on a busy CI machine. Just in case I've bumped the timeout in the busy wait loop.

Also removed the now unneeded `@UpdateForV9` annotation in passing.

Closes #112980

Author: edsavage

muted-tests.yml

@@ -214,9 +214,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/113722
 - class: org.elasticsearch.xpack.esql.expression.function.scalar.convert.ToDateNanosTests
   issue: https://github.com/elastic/elasticsearch/issues/113661
-- class: org.elasticsearch.xpack.restart.MLModelDeploymentFullClusterRestartIT
-  method: testDeploymentSurvivesRestart {cluster=UPGRADED}
-  issue: https://github.com/elastic/elasticsearch/issues/112980
 - class: org.elasticsearch.ingest.geoip.DatabaseNodeServiceIT
   method: testNonGzippedDatabase
   issue: https://github.com/elastic/elasticsearch/issues/113821

x-pack/qa/full-cluster-restart/src/javaRestTest/java/org/elasticsearch/xpack/restart/MLModelDeploymentFullClusterRestartIT.java

@@ -18,8 +18,6 @@
 import org.elasticsearch.common.xcontent.support.XContentMapValues;
 import org.elasticsearch.core.RestApiVersion;
 import org.elasticsearch.core.Strings;
-import org.elasticsearch.core.UpdateForV9;
-import org.elasticsearch.test.rest.RestTestLegacyFeatures;
 import org.elasticsearch.upgrades.FullClusterRestartUpgradeStatus;
 import org.elasticsearch.xcontent.XContentType;
 import org.elasticsearch.xpack.core.ml.inference.assignment.AllocationStatus;
@@ -93,9 +91,6 @@ protected Settings restClientSettings() {
     }
 
     public void testDeploymentSurvivesRestart() throws Exception {
-        @UpdateForV9(owner = UpdateForV9.Owner.MACHINE_LEARNING) // condition will always be true from v8, can be removed
-        var originalClusterSupportsNlpModels = oldClusterHasFeature(RestTestLegacyFeatures.ML_NLP_SUPPORTED);
-        assumeTrue("NLP model deployments added in 8.0", originalClusterSupportsNlpModels);
 
         String modelId = "trained-model-full-cluster-restart";
 
@@ -139,7 +134,7 @@ private void waitForDeploymentStarted(String modelId) throws Exception {
                 equalTo("fully_allocated")
             );
             assertThat(stat.toString(), XContentMapValues.extractValue("deployment_stats.state", stat), equalTo("started"));
-        }, 90, TimeUnit.SECONDS);
+        }, 120, TimeUnit.SECONDS);
     }
 
     private void assertInfer(String modelId) throws IOException {