[KLIB] Deserialize backing field initializers of const in IB-only mode

Missing const initializer leads to crash in property accessors inline
lowering during IC recompilation on JS.

 - fix #KT-50512
 - add test for JS IR IC

js/js.translator/testData/box/incremental/constValInInlineFun.kt

@@ -0,0 +1,18 @@
+// NO_COMMON_FILES
+// MODULE: lib
+// FILE: lib.kt
+
+const val FOO: String = "OK"
+
+class B {
+    inline fun bar(): String {
+        return FOO // Constant property has to have a backing field with initializer
+    }
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+// RECOMPILE
+fun box(): String {
+    return B().bar()
+}