Rename InstanceOfTest to InstanceOfExtensionsTest to deconflict

Author: jkschneider

rewrite-java-17/src/test/java/org/openrewrite/java/tree/InstanceOfTest.java renamed to rewrite-java-17/src/test/java/org/openrewrite/java/tree/InstanceOfExtensionsTest.java

@@ -22,7 +22,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.openrewrite.java.Assertions.java;
 
-public class InstanceOfTest implements RewriteTest {
+public class InstanceOfExtensionsTest implements RewriteTest {
 
     @Test
     void patternMatch() {