Requalify tests as LONG_RUNNING

Prior to this commit, some tests would belong to the PERFORMANCE
`TestGroup`, while they were not testing for performance but rather
performing functional tests that involve long running operations or
timeouts.

This commit moves those tests to the LONG_RUNNING `TestGroup`.

See gh-24830

spring-aop/src/test/java/org/springframework/aop/target/dynamic/RefreshableTargetSourceTests.java

@@ -21,7 +21,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.core.testfixture.EnabledForTestGroups;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.springframework.core.testfixture.TestGroup.PERFORMANCE;
+import static org.springframework.core.testfixture.TestGroup.LONG_RUNNING;
 
 /**
  * @author Rob Harrop
@@ -77,7 +77,7 @@ public class RefreshableTargetSourceTests {
 	}
 
 	@Test
-	@EnabledForTestGroups(PERFORMANCE)
+	@EnabledForTestGroups(LONG_RUNNING)
 	public void testRefreshOverTime() throws Exception {
 		CountingRefreshableTargetSource ts = new CountingRefreshableTargetSource(true);
 		ts.setRefreshCheckDelay(100);