[JS IR] Fix JS code diagnostics tests according to new KLIB checks

^KT-62425

compiler/testData/diagnostics/testsWithJsStdLibAndBackendCompilation/jsCode/warning.fir.kt

@@ -1,10 +1,15 @@
+// FIR_DIFFERENCE
+// The diagnostic cannot be implemented with the FIR frontend checker because it requires constant evaluation over FIR.
+// The diagnostic is implemented as a klib check over IR.
+
+// ERROR_POLICY: SEMANTIC
 fun main(): Unit {
-    js("var a = 08;")
+    js(<!JSCODE_WARNING!>"var a = 08;"<!>)
 
-    js("""var a =
+    js(<!JSCODE_WARNING!>"""var a =
 
-        08;""")
+        08;"""<!>)
 
     val code = "var a = 08;"
-    js(code)
+    js(<!JSCODE_ARGUMENT_NON_CONST_EXPRESSION, JSCODE_CAN_NOT_VERIFY_JAVASCRIPT!>code<!>)
 }