Add an ability to switch between old and new J2K via settings window

Before that it was possible to do only via registry

#KT-33371 fixed

idea/resources/META-INF/extensions/ide.xml

@@ -92,10 +92,6 @@
      </extensions>
 
     <extensions defaultExtensionNs="com.intellij">
-        <registryKey key="kotlin.use.new.j2k"
-                             description="Use new Java to Kotlin Converter (experimental)"
-                             defaultValue="true"
-                             restartRequired="false"/>
         <registryKey key="kotlin.mpp.editTargetPlatformEnabled"
                      description="Enable manual editing of MPP target platforms"
                      defaultValue="false"

idea/resources/META-INF/extensions/ide.xml.183

@@ -100,10 +100,6 @@
     </extensions>
 
     <extensions defaultExtensionNs="com.intellij">
-        <registryKey key="kotlin.use.new.j2k"
-                     description="Use new Java to Kotlin Converter (experimental)"
-                     defaultValue="true"
-                     restartRequired="false"/>
         <registryKey key="kotlin.android.import.mpp.all.transitive"
                      description="Add all transitive dependencies on MPP modules when Android project is imported"
                      defaultValue="true"

idea/resources/META-INF/extensions/ide.xml.as33

@@ -92,10 +92,6 @@
     </extensions>
 
     <extensions defaultExtensionNs="com.intellij">
-        <registryKey key="kotlin.use.new.j2k"
-                   description="Use new Java to Kotlin Converter (experimental)"
-                   defaultValue="true"
-                   restartRequired="false"/>
         <registryKey key="kotlin.android.import.mpp.all.transitive"
                      description="Add all transitive dependencies on MPP modules when Android project is imported"
                      defaultValue="true"

idea/resources/META-INF/extensions/ide.xml.as34

@@ -91,10 +91,6 @@
         <j2kConverterExtension implementation="org.jetbrains.kotlin.nj2k.NewJ2kConverterExtension"/>
     </extensions>
     <extensions defaultExtensionNs="com.intellij">
-            <registryKey key="kotlin.use.new.j2k"
-                       description="Use new Java to Kotlin Converter (experimental)"
-                       defaultValue="true"
-                       restartRequired="false"/>
             <registryKey key="kotlin.android.import.mpp.all.transitive"
                      description="Add all transitive dependencies on MPP modules when Android project is imported"
                      defaultValue="true"

idea/resources/META-INF/plugin-common.xml

@@ -487,7 +487,7 @@
                          parentId="project.propCompiler"/>
 
     <applicationConfigurable groupId="language" displayName="Kotlin" id="preferences.language.Kotlin"
-                             instance="org.jetbrains.kotlin.idea.configuration.KotlinUpdatesSettingsConfigurable"/>
+                             instance="org.jetbrains.kotlin.idea.configuration.KotlinLanguageConfiguration"/>
 
     <projectConfigurable groupId="language" displayName="Kotlin Scripting" id="preferences.language.Kotlin.scripting"
                          instance="org.jetbrains.kotlin.idea.script.configuration.KotlinScriptingSettingsConfigurable"