Make Lombok support opt-in until ready

While investigating and fixing a few last remaining bugs in the Lombok support, the feature requires an explicit opt-in via setting the `REWRITE_LOMBOK` environment variable or the `rewrite.lombok` system property to any non-null value.

rewrite-java-17/src/main/java/org/openrewrite/java/isolated/ReloadableJava17Parser.java

@@ -117,7 +117,8 @@ private ReloadableJava17Parser(
         Options.instance(context).put("-proc", "none");
 
         LOMBOK:
-        if (classpath != null && classpath.stream().anyMatch(it -> it.toString().contains("lombok"))) {
+        if (System.getenv().getOrDefault("REWRITE_LOMBOK", System.getProperty("rewrite.lombok")) != null &&
+            classpath != null && classpath.stream().anyMatch(it -> it.toString().contains("lombok"))) {
             Processor lombokProcessor = null;
             try {
                 // https://projectlombok.org/contributing/lombok-execution-path

rewrite-java-tck/src/main/java/org/openrewrite/java/tree/LombokTest.java

@@ -15,6 +15,8 @@
  */
 package org.openrewrite.java.tree;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledOnJre;
@@ -34,6 +36,16 @@
 @EnabledOnJre(JRE.JAVA_17)
 class LombokTest implements RewriteTest {
 
+    @BeforeAll
+    static void setUp() {
+        System.setProperty("rewrite.lombok", "true");
+    }
+
+    @AfterAll
+    static void tearDown() {
+        System.clearProperty("rewrite.lombok");
+    }
+
     @Override
     public void defaults(RecipeSpec spec) {
         spec.parser(JavaParser.fromJavaVersion().classpath("lombok"));