[JS IC] Delete only PIR related part of IC Cache, not the whole dir

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ic/fileUtil.kt

@@ -46,7 +46,8 @@ fun buildCache(
     }
 
     val icDir = File(cachePath)
-    icDir.deleteRecursively()
+    icDir.listFiles { file: File -> file.name.startsWith("ic-") }!!.forEach { it.deleteRecursively() }
+    File(icDir, "info").delete()
     icDir.mkdirs()
 
     val icData = prepareSingleLibraryIcCache(project, configuration, mainModule.libPath, dependencies, friendDependencies, exportedDeclarations, icCache.data)