[K/Wasm] Add Binaryen sizes to Wasm size tests

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/directives/WasmEnvironmentConfigurationDirectives.kt

@@ -39,4 +39,8 @@ object WasmEnvironmentConfigurationDirectives : SimpleDirectivesContainer() {
         description = "Enables generation of source map",
         applicability = DirectiveApplicability.Global
     )
+
+    val RUN_THIRD_PARTY_OPTIMIZER by directive(
+        description = "Also run third-party optimizer (for now, only binaryen is supported) after the main compilation",
+    )
 }

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/model/ResultingArtifacts.kt

@@ -54,6 +54,7 @@ object BinaryArtifacts {
     class Wasm(
         val compilerResult: WasmCompilerResult,
         val compilerResultWithDCE: WasmCompilerResult,
+        val compilerResultWithOptimizer: WasmCompilerResult?,
     ) : ResultingArtifact.Binary<Wasm>() {
         override val kind: BinaryKind<Wasm>
             get() = ArtifactKinds.Wasm