JS backend: use FqNameUnsafe when generate delegateName to avoid problems with special names.

#EA-64029 Fixed

js/js.translator/testData/delegation/cases/onObject.kt

@@ -0,0 +1,23 @@
+package foo
+
+trait T {
+    fun foo(): String
+}
+
+class TImpl(val v: String) : T {
+    override fun foo() = v
+}
+
+class A {
+    class object : T by TImpl("A.Default")
+}
+
+object B : T by TImpl("B")
+
+
+fun box(): String {
+    assertEquals("A.Default", A.foo())
+    assertEquals("B", B.foo())
+
+    return "OK"
+}