Change policy with legacy compiler backend

[JS] Remove incremental js jps test

[JS] Remove test of maven js archetype

[JS] Fix another one test

[JS] Fix tests for jps

[JS] Try to fix maven test data

[JS] Fix test data

[JS] Fix test data for ant

[JS] Fix jsExtraHelp test

[JS] Fix test run from not-Gradle build tools

[JS] Set flag without compiler error

[JS] Disable warnings and errors in legacy compiler called from Gradle

[JS] Proofread messages

[JS] Not proofread messages

KT-42326

compiler/tests/org/jetbrains/kotlin/cli/AnalysisHandlerExtensionTest.kt

@@ -67,7 +67,7 @@ class AnalysisHandlerExtensionTest : TestCaseWithTmpdir() {
         val plugin = writePlugin(klass)
         val args = listOf("-Xplugin=$plugin", mainKt.absolutePath)
         val outputPath = if (compiler is K2JSCompiler)
-            listOf("-output", tmpdir.resolve("out.js").absolutePath)
+            listOf("-Xuse-deprecated-legacy-compiler", "-output", tmpdir.resolve("out.js").absolutePath)
         else
             listOf("-d", tmpdir.resolve("out").absolutePath)
         val (output, exitCode) = CompilerTestUtil.executeCompiler(compiler, args + outputPath + extras)