Fails on 8.11 branch, not on main

**Build scan:**
https://gradle-enterprise.elastic.co/s/4irsnbcx5vpfw/tests/:server:test/org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviationTests/testConcurrentEquals
**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviationTests.testConcurrentEquals" -Dtests.seed=ED3008B8577B78F8 -Dtests.locale=fr-BE -Dtests.timezone=Asia/Kolkata -Druntime.java=21
```

**Applicable branches:**
8.11

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviationTests&tests.test=testConcurrentEquals


**Failure excerpt:**
```
java.util.concurrent.ExecutionException: java.lang.AssertionError: expected: org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviation<{"mEKUa":{"value":0.23608820427483945,"value_as_string":"0.24"}}> but was: org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviation<{"mEKUa":{"value":0.23608820427483945,"value_as_string":"0.24"}}>

  at __randomizedtesting.SeedInfo.seed([ED3008B8577B78F8:9FDD38896C659AB4]:0)
  at java.util.concurrent.FutureTask.report(FutureTask.java:122)
  at java.util.concurrent.FutureTask.get(FutureTask.java:191)
  at org.elasticsearch.test.AbstractWireTestCase.concurrentTest(AbstractWireTestCase.java:117)
  at org.elasticsearch.test.AbstractWireTestCase.testConcurrentEquals(AbstractWireTestCase.java:91)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
  at java.lang.reflect.Method.invoke(Method.java:580)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:48)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:1583)

  Caused by: java.lang.AssertionError: expected: org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviation<{"mEKUa":{"value":0.23608820427483945,"value_as_string":"0.24"}}> but was: org.elasticsearch.search.aggregations.metrics.InternalMedianAbsoluteDeviation<{"mEKUa":{"value":0.23608820427483945,"value_as_string":"0.24"}}>

    at org.junit.Assert.fail(Assert.java:88)
    at org.junit.Assert.failNotEquals(Assert.java:834)
    at org.junit.Assert.assertEquals(Assert.java:118)
    at org.junit.Assert.assertEquals(Assert.java:144)
    at org.elasticsearch.test.AbstractWireTestCase.lambda$testConcurrentEquals$0(AbstractWireTestCase.java:93)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
    at java.util.concurrent.FutureTask.run(FutureTask.java:317)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
    at java.lang.Thread.run(Thread.java:1583)

```
server/src/test/java/org/elasticsearch/search/aggregations/metrics/InternalMedianAbsoluteDeviationTests.java
protected void assertReduced(InternalMedianAbsoluteDeviation reduced, List<InternalMedianAbsoluteDeviation> inputs) {
        final TDigestState expectedValuesSketch = TDigestState.createUsingParamsFrom(reduced.getValuesSketch());
        long totalCount = 0;
        for (InternalMedianAbsoluteDeviation input : inputs) {
            expectedValuesSketch.add(input.getValuesSketch());
            totalCount += input.getValuesSketch().size();
        }
        assertEquals(totalCount, reduced.getValuesSketch().size());
        if (totalCount > 0) {
            assertEquals(expectedValuesSketch.quantile(0), reduced.getValuesSketch().quantile(0), 0d);
            assertEquals(expectedValuesSketch.quantile(1), reduced.getValuesSketch().quantile(1), 0d);
        }
    }
    @Override
    protected boolean supportsSampling() {
        return true;
    }
    @Override
    protected void assertSampled(
        InternalMedianAbsoluteDeviation sampled,
        InternalMedianAbsoluteDeviation reduced,
        SamplingContext samplingContext
    ) {
        assertThat(sampled.getMedianAbsoluteDeviation(), equalTo(reduced.getMedianAbsoluteDeviation()));
    }
    @Override
    protected void assertFromXContent(InternalMedianAbsoluteDeviation internalMAD, ParsedAggregation parsedAggregation) throws IOException {
        assertTrue(parsedAggregation instanceof ParsedMedianAbsoluteDeviation);
        ParsedMedianAbsoluteDeviation parsedMAD = (ParsedMedianAbsoluteDeviation) parsedAggregation;