[Test] Extend timeout for CoreWithMultipleProjectsClientYamlTestSuiteIT timing out in release tests (#130074)

x-pack/qa/multi-project/core-rest-tests-with-multiple-projects/src/yamlRestTest/java/org/elasticsearch/multiproject/test/CoreWithMultipleProjectsClientYamlTestSuiteIT.java

@@ -18,7 +18,7 @@ import org.elasticsearch.test.rest.yaml.ClientYamlTestCandidate;
 import org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase;
 import org.junit.ClassRule;
 
-@TimeoutSuite(millis = 30 * TimeUnits.MINUTE)
+@TimeoutSuite(millis = 45 * TimeUnits.MINUTE)
 public class CoreWithMultipleProjectsClientYamlTestSuiteIT extends MultipleProjectsClientYamlSuiteTestCase {
 
     @ClassRule