Move idea plugin artifacts one dir deeper to simplify runIde task

Running idea via specifying plugins dir (instead of plugin.path property
allow idea to select proper plugin version without a need to remove a bundled
plugin. But in order to make it work, the regular and ultimate plugins
should have separate parent dirs.

TeamCityBuild.xml

@@ -6,7 +6,7 @@
 
     <property name="version_substitute_dir" value="${basedir}/versions_temp/"/>
 
-    <property name="artifact.output.path" value="${basedir}/dist/artifacts"/>
+    <property name="artifact.output.path" value="${basedir}/dist/artifacts/ideaPlugin"/>
     <property name="plugin.xml" value="idea/src/META-INF/plugin.xml"/>
     <property name="plugin.xml.bk" value="${version_substitute_dir}/plugin.xml.bk"/>
     <property name="plugin.xml.versioned" value="${plugin.xml}.versioned"/>

build.gradle.kts

@@ -79,8 +79,8 @@ val commonBuildDir = File(rootDir, "build")
 val distDir = "$rootDir/dist"
 val distKotlinHomeDir = "$distDir/kotlinc"
 val distLibDir = "$distKotlinHomeDir/lib"
-val ideaPluginDir = "$distDir/artifacts/Kotlin"
-val ideaUltimatePluginDir = "$distDir/artifacts/KotlinUltimate"
+val ideaPluginDir = "$distDir/artifacts/ideaPlugin/Kotlin"
+val ideaUltimatePluginDir = "$distDir/artifacts/ideaUltimatePlugin/Kotlin"
 
 extra["distDir"] = distDir
 extra["distKotlinHomeDir"] = distKotlinHomeDir