[Spec tests] Add test for infix fun + KT-36786

compiler/tests-spec/testData/codegen/box/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-4/pos/1.1.kt

@@ -0,0 +1,37 @@
+// WITH_RUNTIME
+
+/*
+ * KOTLIN CODEGEN BOX SPEC TEST (POSITIVE)
+ *
+ * SPEC VERSION: 0.1-268
+ * PLACE: overload-resolution, building-the-overload-candidate-set-ocs, infix-function-call -> paragraph 4 -> sentence 1
+ * NUMBER: 1
+ * DESCRIPTION: infix calls for properties
+ */
+
+class C() {
+    var isInvokeCalled = false
+    infix operator fun invoke(i: Int) { isInvokeCalled = true } //(1)
+}
+
+class B() {
+    val memberValC
+        get() = c
+}
+val c = C()
+
+val B.extensionValC: C
+    get() = c
+
+
+fun box(): String{
+    val b = B()
+    b memberValC 3         //resolved to (1) o_O
+    if (b.memberValC.isInvokeCalled) {
+        c.isInvokeCalled = false
+        b extensionValC 4      //resolved to (1) o_O
+        if (b.extensionValC.isInvokeCalled)
+            return "OK"
+    }
+    return "NOK"
+}

compiler/tests-spec/testData/codegen/box/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/testsMap.json

@@ -0,0 +1,14 @@
+{
+  "4": {
+    "pos": {
+      "1": [
+        {
+          "specVersion": "0.1-268",
+          "casesNumber": 0,
+          "description": "infix calls for properties",
+          "unexpectedBehaviour": false
+        }
+      ]
+    }
+  }
+}