[JS IR] Copy JS artifacts to the build directory if the compiler crashes

Previously in 3fb1096c18 we've implemented
dumping the IR after each phase when running JS IR box tests.

However, because those dumps are saved to a temporary directory,
they can be lost in case we never make it to
`jsArtifactsHandlersStep` where files from that temporary
directory were copied to the `build/out` directory.
This could happen if, for example, the compiler crashed.
In that case, having IR dumps is even more useful, as they can help
investigate the crash.

Here we make `JsArtifactsDumpHandler` an `AfterAnalysisChecker` so that
it runs no matter what.

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

@@ -84,6 +84,7 @@ abstract class AbstractJsBlackBoxCodegenTestBase<R : ResultingArtifact.FrontendO
         useAfterAnalysisCheckers(
             ::JsFailingTestSuppressor,
             ::BlackBoxCodegenSuppressor,
+            ::JsArtifactsDumpHandler
         )
 
         facadeStep(frontendFacade)
@@ -101,7 +102,6 @@ abstract class AbstractJsBlackBoxCodegenTestBase<R : ResultingArtifact.FrontendO
         jsArtifactsHandlersStep {
             useHandlers(
                 ::NodeJsGeneratorHandler,
-                ::JsArtifactsDumpHandler,
                 ::JsBoxRunner,
                 ::JsMinifierRunner,
                 ::JsAstHandler

js/js.tests/test/org/jetbrains/kotlin/js/test/handlers/JsArtifactsDumpHandler.kt

@@ -6,20 +6,20 @@
 package org.jetbrains.kotlin.js.test.handlers
 
 import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.TranslationMode
-import org.jetbrains.kotlin.test.backend.handlers.JsBinaryArtifactHandler
+import org.jetbrains.kotlin.test.WrappedException
 import org.jetbrains.kotlin.test.directives.JsEnvironmentConfigurationDirectives
-import org.jetbrains.kotlin.test.model.BinaryArtifacts
-import org.jetbrains.kotlin.test.model.TestModule
-import org.jetbrains.kotlin.test.services.JUnit5Assertions
+import org.jetbrains.kotlin.test.model.AfterAnalysisChecker
 import org.jetbrains.kotlin.test.services.TestServices
 import org.jetbrains.kotlin.test.services.configuration.JsEnvironmentConfigurator
 import org.jetbrains.kotlin.test.services.moduleStructure
 import java.io.File
 
-class JsArtifactsDumpHandler(testServices: TestServices) : JsBinaryArtifactHandler(testServices) {
-    override fun processModule(module: TestModule, info: BinaryArtifacts.Js) {}
+/**
+ * Copy JS artifacts from the temporary directory to the `js/js.tests/build/out` directory.
+ */
+class JsArtifactsDumpHandler(testServices: TestServices) : AfterAnalysisChecker(testServices) {
 
-    override fun processAfterAllModules(someAssertionWasFailed: Boolean) {
+    override fun check(failedAssertions: List<WrappedException>) {
         val originalFile = testServices.moduleStructure.originalTestDataFiles.first()
         val allDirectives = testServices.moduleStructure.allDirectives
 
@@ -57,4 +57,4 @@ class JsArtifactsDumpHandler(testServices: TestServices) : JsBinaryArtifactHandl
         if (from.listFiles()?.size == 0) return
         from.copyRecursively(into, overwrite = true)
     }
-}
+}