Processing implicit extension receiver usages in outflow processing

idea/testData/slicer/outflow/implicitReceiver.kt

@@ -0,0 +1,13 @@
+// FLOW: OUT
+
+fun Any.extensionFun(): Any {
+    return this
+}
+
+fun String.foo() {
+    val v = extensionFun()
+}
+
+fun main() {
+    <caret>"A".foo()
+}

idea/testData/slicer/outflow/implicitReceiver.results.txt

@@ -0,0 +1,7 @@
+12 <bold>"A"</bold>.foo()
+7 	fun <bold>String</bold>.foo() {
+3 		fun <bold>Any</bold>.extensionFun(): Any {
+4 			return <bold>this</bold>
+3 				fun Any.<bold>extensionFun(): Any {</bold>
+8 					val v = <bold>extensionFun()</bold>
+8 						val <bold>v = extensionFun()</bold>