erasure wildcards when generate overriding

(cherry picked from commit 58ced7b4e6be23577a1427c93a7b9c58a4edb5f3)

java/java-tests/testData/codeInsight/overrideImplement/beforeErasureWildcard.java

@@ -0,0 +1,7 @@
+interface Generic<T> {
+  T foo();
+}
+
+class II implements Generic<?> {
+  <caret>
+}