**Build scan:**
https://gradle-enterprise.elastic.co/s/piyf2ga5fnjjg/tests/:modules:repository-gcs:test/org.elasticsearch.repositories.gcs.GoogleCloudStorageClientSettingsTests/testLoadsProxySettings

**Reproduction line:**
```
./gradlew ':modules:repository-gcs:test' --tests "org.elasticsearch.repositories.gcs.GoogleCloudStorageClientSettingsTests.testLoadsProxySettings" -Dtests.seed=147C59CC808694D0 -Dtests.locale=mk -Dtests.timezone=America/Cordoba -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.repositories.gcs.GoogleCloudStorageClientSettingsTests&tests.test=testLoadsProxySettings

**Failure excerpt:**
```
java.lang.IllegalArgumentException: port out of range:65536

  at __randomizedtesting.SeedInfo.seed([147C59CC808694D0:D0F78F252FEAAD7A]:0)
  at java.net.InetSocketAddress.checkPort(InetSocketAddress.java:152)
  at java.net.InetSocketAddress.<init>(InetSocketAddress.java:197)
  at org.elasticsearch.repositories.gcs.GoogleCloudStorageClientSettingsTests.testLoadsProxySettings(GoogleCloudStorageClientSettingsTests.java:135)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  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:833)

```
modules/repository-gcs/src/test/java/org/elasticsearch/repositories/gcs/GoogleCloudStorageClientSettingsTests.java
final String clientName = randomAlphaOfLength(5).toLowerCase(Locale.ROOT);
            final GoogleCloudStorageClientSettings clientSettings = randomClient(clientName, settings, secureSettings, deprecationWarnings);
            expectedClients.put(clientName, clientSettings);
        }
        if (randomBoolean()) {
            final GoogleCloudStorageClientSettings clientSettings = randomClient("default", settings, secureSettings, deprecationWarnings);
            expectedClients.put("default", clientSettings);
        } else {
            expectedClients.put("default", getClientSettings(Settings.EMPTY, "default"));
        }
        return Tuple.tuple(expectedClients, settings.setSecureSettings(secureSettings).build());
    }
    
    private static GoogleCloudStorageClientSettings randomClient(
        final String clientName,
        final Settings.Builder settings,
        final MockSecureSettings secureSettings,
        final List<Setting<?>> deprecationWarnings
    ) throws Exception {
        final Tuple<ServiceAccountCredentials, byte[]> credentials = randomCredential(clientName);
        final ServiceAccountCredentials credential = credentials.v1();
        secureSettings.setFile(CREDENTIALS_FILE_SETTING.getConcreteSettingForNamespace(clientName).getKey(), credentials.v2());
        String endpoint;
        if (randomBoolean()) {
            endpoint = randomFrom(
                "http://www.elastic.co",
                "http://metadata.google.com:88/oauth",
                "https://www.googleapis.com",
                "https://www.elastic.co:443",
                "http://localhost:8443",