Extend timeout in IngestGeoIpClientYamlTestSuiteIT (#138610)

Some slow CI test clusters are not able to download all four GeoIP databases within 10 seconds, so we bump the timeout to 20 seconds.

See #138460 for a more detailed analysis.

Fixes #138460
Fixes #138502

(cherry picked from commit 4fb85c6)

# Conflicts:
#	modules/ingest-geoip/src/yamlRestTest/java/org/elasticsearch/ingest/geoip/IngestGeoIpClientYamlTestSuiteIT.java
#	muted-tests.yml

Author: nielsbauman

modules/ingest-geoip/src/yamlRestTest/java/org/elasticsearch/ingest/geoip/IngestGeoIpClientYamlTestSuiteIT.java

@@ -32,6 +32,7 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 import static org.hamcrest.Matchers.containsInAnyOrder;
 import static org.hamcrest.Matchers.equalTo;
@@ -92,7 +93,9 @@ public void waitForDatabases() throws Exception {
                 databaseNames,
                 containsInAnyOrder("GeoLite2-City.mmdb", "GeoLite2-Country.mmdb", "GeoLite2-ASN.mmdb", "MyCustomGeoLite2-City.mmdb")
             );
-        });
+            // Downloading all four databases may take some time, so we set a longer timeout here.
+            // If 20 seconds prove insufficient, we should first investigate whether we can speed up the database downloader.
+        }, 20, TimeUnit.SECONDS);
     }
 
     /**