[Build] Use fixated compiler version for kotlin-gradle-subplugin-example

Relates to KT-61911
As this project produces a Gradle plugin, it has AV/LV limitations and should not use dependencies of LV newer than the compiler used to produce the plugin

Author: ALikhachev

libraries/examples/kotlin-gradle-subplugin-example/build.gradle

@@ -18,14 +18,11 @@ dependencies {
     // compile "org.jetbrains.kotlin:kotlin-gradle-plugin-api:$kotlin_version"
 
     compileOnly RepoDependencies.kotlinStdlib(project)
-    compileOnly project(':compiler')
-    compileOnly project(':compiler:plugin-api')
-    compileOnly project(':compiler:cli-common')
-    compileOnly project(':compiler:cli')
+    // kotlin-for-gradle-plugins-compilation
+    String btaBootstrapVersion = libs.versions.kotlin.for.gradle.plugins.compilation.get()
+    compileOnly("org.jetbrains.kotlin:kotlin-compiler-embeddable:$btaBootstrapVersion")
 
     compileOnly gradleApi()
-
-    compileOnly project(':dependencies:intellij-core')
 }
 
 GradleCommonKt.configureCommonPublicationSettingsForGradle(project, false, false)

libraries/examples/kotlin-gradle-subplugin-example/src/main/kotlin/example/CompilerPlugin.kt

@@ -16,8 +16,8 @@
 
 package example
 
-import com.intellij.mock.MockProject
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
+import org.jetbrains.kotlin.com.intellij.mock.MockProject
 import org.jetbrains.kotlin.compiler.plugin.*
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.CompilerConfigurationKey