[Plugins] Deprecate ComponentRegistrar

^KT-52665 In Progress

js/js.tests/test/org/jetbrains/kotlin/integration/JsIrAnalysisHandlerExtensionTest.kt

@@ -3,6 +3,8 @@
  * 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.integration
 
 import com.intellij.mock.MockProject
@@ -132,4 +134,4 @@ private class CustomAnalysisHandler : AnalysisHandlerExtension {
         }
         return AnalysisResult.success(BindingContext.EMPTY, module, false)
     }
-}
+}