Add back empty stub implementations of KotlinGradleSubplugin (KT-39809)

* If a KotlinGradleSubplugin implements
 KotlinCompilerPluginSupportPlugin, don't apply it as a legacy plugin

* Add the legacy KotlinGradleSubplugin implementations back so that
 when there's JAR hell with META-INF/services in the old artifacts
 pointing to the classes, loading the plugins with ServiceLoader (legacy
 implementation) from the new artifacts would not fail.

* There's a corner case for plugins not in kotlin-gradle-plugin
 If a newer and older version of such a subplugin is used with an older
 version of the Kotlin Gradle plugin, the latter will find the META-INF
 entries and will try to load the subplugins from the new version. With
 the original fix for KT-39809, this would result in silently ignored
 empty stub implementations.

 Given that the Kotlin Gradle plugin can now check if a subplugin
 supports the new API, it's OK to keep the old entries and make the
 stub implementations throw a build error when called, so that improper
 plugin versions are not ignored and are clearly reported.

 Note that this is only necessary for the subplugins not bundled in the
 kotlin-gradle-plugin module, as those will always be in sync with the
 Kotlin version.

Issue #KT-39809 Fixed

libraries/tools/kotlin-allopen/src/main/kotlin/org/jetbrains/kotlin/allopen/gradle/AllOpenSubplugin.kt

@@ -16,15 +16,22 @@
 
 package org.jetbrains.kotlin.allopen.gradle
 
+import org.gradle.api.GradleException
 import org.gradle.api.Project
 import org.gradle.api.provider.Provider
+import org.gradle.api.tasks.compile.AbstractCompile
+import org.gradle.tooling.provider.model.ToolingModelBuilder
 import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry
 import org.jetbrains.kotlin.allopen.gradle.model.builder.AllOpenModelBuilder
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
 import org.jetbrains.kotlin.gradle.plugin.*
 import javax.inject.Inject
 
 class AllOpenGradleSubplugin @Inject internal constructor(private val registry: ToolingModelBuilderRegistry) :
-    KotlinCompilerPluginSupportPlugin {
+    KotlinCompilerPluginSupportPlugin,
+    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    KotlinGradleSubplugin<AbstractCompile> {
+
     companion object {
         fun getAllOpenExtension(project: Project): AllOpenExtension {
             return project.extensions.getByType(AllOpenExtension::class.java)
@@ -68,4 +75,21 @@ class AllOpenGradleSubplugin @Inject internal constructor(private val registry:
     override fun getCompilerPluginId() = "org.jetbrains.kotlin.allopen"
     override fun getPluginArtifact(): SubpluginArtifact =
         JetBrainsSubpluginArtifact(artifactId = ALLOPEN_ARTIFACT_NAME)
+
+    //region Stub implementation for legacy API, KT-39809
+    internal constructor(): this(object : ToolingModelBuilderRegistry {
+        override fun register(p0: ToolingModelBuilder) = Unit
+        override fun getBuilder(p0: String): ToolingModelBuilder? = null
+    })
+
+    override fun isApplicable(project: Project, task: AbstractCompile): Boolean = true
+
+    override fun apply(
+        project: Project, kotlinCompile: AbstractCompile, javaCompile: AbstractCompile?, variantData: Any?, androidProjectHandler: Any?,
+        kotlinCompilation: KotlinCompilation<KotlinCommonOptions>?
+    ): List<SubpluginOption> = throw GradleException(
+        "This version of the kotlin-allopen Gradle plugin is built for a newer Kotlin version. " +
+                "Please use an older version of kotlin-allopen or upgrade the Kotlin version to make them match."
+    )
+    //endregion
 }

libraries/tools/kotlin-allopen/src/main/resources/META-INF/services/org.jetbrains.kotlin.gradle.plugin.KotlinGradleSubplugin

@@ -0,0 +1 @@
+org.jetbrains.kotlin.allopen.gradle.AllOpenGradleSubplugin