[kotlin] cleanup: get rid of fake packages in content modules of Kotlin Frontend plugin (KTIJ-32906)

Fake packages were used to ensure that the main plugin classloader is used to load the classes from content modules. Now the same can be achieved explicitly with loading="embedded" attribute. This is also needed to ensure that the classpath for content modules can be properly specified (this is needed for IJPL-165692).

GitOrigin-RevId: 94965f7cde9083e4b4f8eb460f0da94f004b7cc9

plugins/kotlin/base/code-insight/minimal/resource/kotlin.base.code-insight.minimal.xml

@@ -1,4 +1,4 @@
-<idea-plugin package="org.jetbrains.kotlin.idea.codeInsight.fake">
+<idea-plugin>
   <module value="kotlin.base.code-insight.minimal"/>
   <extensionPoints>
     <extensionPoint qualifiedName="org.jetbrains.kotlin.smartEnterProcessorFixer" beanClass="com.intellij.lang.LanguageExtensionPoint" dynamic="true">

plugins/kotlin/base/resources/resources/kotlin.base.resources.xml

@@ -1,3 +1,3 @@
-<idea-plugin package="org.jetbrains.kotlin.idea.resources.fake">
+<idea-plugin>
   <module value="kotlin.base.resources" />
 </idea-plugin>

plugins/kotlin/formatter/minimal/resources/kotlin.formatter.minimal.xml

@@ -1,3 +1,3 @@
-<idea-plugin package="org.jetbrains.kotlin.idea.core.formatter">
+<idea-plugin>
   <module value="kotlin.formatter.minimal"/>
 </idea-plugin>

plugins/kotlin/highlighting/highlighting-minimal/resource/kotlin.highlighting.minimal.xml

@@ -1,3 +1,3 @@
-<idea-plugin package="org.jetbrains.kotlin.idea.highlighter.fake">
+<idea-plugin>
   <module value="kotlin.highlighting.minimal" />
 </idea-plugin>