[JS_IR] Use new plugin to build Kotlin/JS stdlib with IR compiler

- Switch to building stdlib with bootstrap compiler since IR is stable
  enough
- Build stdlib with coreLibs by default
- Include JS IR stdlib to kotlin distribution

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt

@@ -21,9 +21,9 @@ import org.jetbrains.kotlin.utils.fileUtils.withReplacedExtensionOrNull
 import java.io.File
 import java.lang.Boolean.getBoolean
 
-private val fullRuntimeKlib = "libraries/stdlib/js-ir/build/fullRuntime/klib"
-private val defaultRuntimeKlib = "libraries/stdlib/js-ir/build/reducedRuntime/klib"
-private val kotlinTestKLib = "libraries/stdlib/js-ir/build/kotlin.test/klib"
+private val fullRuntimeKlib: String = System.getProperty("kotlin.js.full.stdlib.path")
+private val defaultRuntimeKlib = System.getProperty("kotlin.js.reduced.stdlib.path")
+private val kotlinTestKLib = System.getProperty("kotlin.js.kotlin.test.path")
 
 abstract class BasicIrBoxTest(
     pathToTestDir: String,

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicWasmBoxTest.kt

@@ -37,7 +37,7 @@ import java.io.File
 import java.lang.Boolean.getBoolean
 
 private val wasmRuntimeKlib =
-    loadKlib("libraries/stdlib/js-ir/build/wasmRuntime/klib")
+    loadKlib(System.getProperty("kotlin.wasm.stdlib.path"))
 
 abstract class BasicWasmBoxTest(
     private val pathToTestDir: String,