JS: add tests too prove that operator conventions are correctly inlined. Support inlining of invoke operator. See KT-7588

js/js.translator/testData/box/inlineMultiModule/operators.kt

@@ -0,0 +1,26 @@
+// MODULE: lib
+// FILE: lib.kt
+
+class A {
+    inline operator fun plus(a: Int) = a + 10
+}
+
+class B
+
+inline operator fun B.plus(b: Int) = b + 20
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+// CHECK_NOT_CALLED_IN_SCOPE: function=plus_za3lpa$ scope=box
+// CHECK_NOT_CALLED_IN_SCOPE: function=plus scope=box
+
+fun box(): String {
+    var result = A() + 1
+    if (result != 11) return "fail: member operator"
+
+    result = B() + 2
+    if (result != 22) return "fail: extension operator"
+
+    return "OK"
+}