[java-completion] MissingClassBody: insert body before last error element

The last error element could start a new record (IDEA-290767) or be just unparsed garbage. In any case, adding {} after it would not make anything better, as {} will be unparsed as well.

GitOrigin-RevId: c3ffe1eb107e7c6ee08ff4e867d83323c14e9613

java/java-tests/testData/codeInsight/completeStatement/ClassBeforeRecord.java

@@ -0,0 +1,7 @@
+public class ClassBeforeRecord {
+
+  class InnerA<caret>
+
+    record InnerB() {
+  }
+}

java/java-tests/testData/codeInsight/completeStatement/ClassBeforeRecord_after.java

@@ -0,0 +1,9 @@
+public class ClassBeforeRecord {
+
+    class InnerA {
+        <caret>
+    }
+
+    record InnerB() {
+  }
+}