[K/JS] Rework symbol hash calculation to make IC works with @JsExport and @JsName changes

js/js.translator/testData/incremental/invalidation/jsName/lib2/lib.0.kt

@@ -0,0 +1,3 @@
+open class FooBarImpl : Bar(), Foo {
+   override fun foo() = "FooImpl"
+}

js/js.translator/testData/incremental/invalidation/jsName/lib2/module.info

@@ -0,0 +1,20 @@
+STEP 0:
+    dependencies: lib1
+    modifications:
+        U : lib.0.kt -> lib.kt
+    added file: lib.kt
+STEP 1:
+    dependencies: lib1
+    updated exports: lib.kt
+STEP 2:
+    dependencies: lib1
+    updated imports: lib.kt
+STEP 3:
+    dependencies: lib1
+    updated imports: lib.kt
+STEP 4:
+    dependencies: lib1
+    updated imports: lib.kt
+STEP 5:
+    dependencies: lib1
+    updated exports: lib.kt