Implemented Operator To Function intention action.

Converts +a, --a, a * b, a..b, a %= b, a in b, etc. to their function call counterparts.

idea/testData/intentions/operatorToFunction/notApplicableCallWithInvokeMethod.kt

@@ -0,0 +1,8 @@
+// IS_APPLICABLE: false
+class coffee() {
+    fun invoke() {
+    }
+}
+fun main() {
+    val f = coffee().<caret>invoke()
+}