[Gradle, JS] environment map as input, not nested

Merge-request: KT-MR-6326
Merged-by: Ilya Goncharov <Ilya.Goncharov@jetbrains.com>

^KT-51532 fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -1021,6 +1021,9 @@ abstract class AbstractKotlin2JsGradlePluginIT(protected val irBackend: Boolean)
             build("build") {
                 checkIrCompilationMessage()
 
+                // It makes sense only since Tests will be run on Gradle 7.2
+                assertOutputDoesNotContain("Execution optimizations have been disabled for task ':nodeTest'")
+
                 assertTasksExecuted(":nodeTest")
             }
         }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/KotlinJsTest.kt

@@ -46,7 +46,7 @@ constructor(
 
     private val projectPath = project.path
 
-    @Nested
+    @Input
     var environment = mutableMapOf<String, String>()
 
     @get:Internal