Add CleanupAssertions junit-team#5193 junit-team#5002

- https://docs.openrewrite.org/recipes/java/testing/junit/jupiterbestpractices

Signed-off-by: Vincent Potucek <vpotucek@me.com>

Author: Vincent Potucek

jupiter-tests/src/test/java/org/junit/jupiter/api/AssertEqualsAssertionsTests.java

@@ -10,6 +10,7 @@
 
 package org.junit.jupiter.api;
 
+import static org.junit.jupiter.api.AssertNull.assertNull;
 import static org.junit.jupiter.api.AssertionTestUtils.assertExpectedAndActualValues;
 import static org.junit.jupiter.api.AssertionTestUtils.assertMessageEndsWith;
 import static org.junit.jupiter.api.AssertionTestUtils.assertMessageEquals;