JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/inline/inlineGenericSimple.kt

@@ -0,0 +1,25 @@
+package foo
+
+// CHECK_CONTAINS_NO_CALLS: doNothingInt
+// CHECK_CONTAINS_NO_CALLS: doNothingStr
+
+internal inline fun <T> doNothing(a: T): T {
+    return a
+}
+
+internal fun doNothingInt(a: Int): Int {
+    return doNothing(a)
+}
+
+internal fun doNothingStr(a: String): String {
+    return doNothing(a)
+}
+
+fun box(): String {
+    assertEquals(1, doNothingInt(1))
+    assertEquals(2, doNothingInt(2))
+    assertEquals("ab", doNothingStr("ab"))
+    assertEquals("abc", doNothingStr("abc"))
+
+    return "OK"
+}