Suppress deprecations for MavenPluginConfiguratorG6

This allowed to enable warning-as-errors for :k-g-p:main compilation

^KT-47047 In Progress

buildSrc/src/main/kotlin/common-configuration.gradle.kts

@@ -152,7 +152,6 @@ fun Project.configureKotlinCompilationOptions() {
 
         // TODO: fix remaining warnings and remove this property.
         val tasksWithWarnings = listOf(
-            ":kotlin-gradle-plugin:compileKotlin",
             ":kotlin-gradle-plugin:compileCommonKotlin",
             ":kotlin-gradle-plugin:compileGradle70Kotlin"
         )

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/internal/MavenPluginConfiguratorG6.kt

@@ -2,6 +2,7 @@
  * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
+@file:Suppress("DEPRECATION")
 
 package org.jetbrains.kotlin.gradle.plugin.internal
 
@@ -15,7 +16,6 @@ import org.gradle.api.tasks.Upload
 import org.jetbrains.kotlin.gradle.plugin.mpp.AbstractKotlinTarget
 import org.jetbrains.kotlin.gradle.plugin.mpp.PomDependenciesRewriter
 
-@Suppress("DEPRECATION")
 class MavenPluginConfiguratorG6 : MavenPluginConfigurator {
     override fun applyConfiguration(
         project: Project,