[FE] Generate default method for ComponentRegistrar.supportsK2

This is needed to keep binary compatibility for existing compilers plugins
^KT-52872 Fixed

compiler/plugin-api/build.gradle.kts

@@ -14,3 +14,7 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
+    kotlinOptions.freeCompilerArgs += "-Xjvm-default=all-compatibility"
+}