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/testData/integration/ant/js/simpleWithJsFileAsAnotherLibModuleKind/build.xml

@@ -5,12 +5,15 @@
   <target name="build">
     <mkdir dir="${temp.library.path}"/>
 
-    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true" moduleKind="umd"/>
+    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true" moduleKind="umd">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
 
     <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call" moduleKind="amd">
       <libraries>
         <pathelement path="${temp.library.path}/jslib-example.meta.js"/>
       </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
     </kotlin2js>
     <copy todir="${temp}">
       <fileset dir="${temp.library.path}">