[#2269] chore: Fix imports in MutinySessionTest

Author: DavideD

hibernate-reactive-core/src/test/java/org/hibernate/reactive/MutinySessionTest.java

@@ -27,7 +27,13 @@
 import jakarta.persistence.metamodel.EntityType;
 
 import static java.util.concurrent.TimeUnit.MINUTES;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
 
 @Timeout(value = 10, timeUnit = MINUTES)