Postfix templates: add a template to wrap an expression with a function call (IDEA-122461)

java/java-tests/testData/codeInsight/template/postfix/templates/arg/simple.java

@@ -0,0 +1,6 @@
+public class Foo {
+  void m(boolean b) {
+
+    b.arg<caret>
+  }
+}

java/java-tests/testData/codeInsight/template/postfix/templates/arg/simple_after.java

@@ -0,0 +1,6 @@
+public class Foo {
+  void m(boolean b) {
+
+      functionCall(b<caret>)
+  }
+}