IDEA-123355 Postfix template expansions .null/.notnull after 'else' fail to provide a valid Java output

allow JavaWithIfExpressionSurrounder just after else keywords

java/java-tests/testData/codeInsight/template/postfix/templates/notnull/elseStatement.java

@@ -0,0 +1,8 @@
+public class Foo {
+    void m(Object o) {
+        if (true) {
+          
+        }
+        else o.notnull<caret>
+    }
+}

java/java-tests/testData/codeInsight/template/postfix/templates/notnull/elseStatement_after.java

@@ -0,0 +1,10 @@
+public class Foo {
+    void m(Object o) {
+        if (true) {
+
+        }
+        else if (o != null) {
+            <caret>
+        }
+    }
+}