Apply scripting subplugin in gradle mpp plugin, so scripts could be added to mpp sources

#KT-30679 fixed

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

@@ -398,6 +398,7 @@ class NewMultiplatformIT : BaseGradleIT() {
                     arrayOf(
                         it + "com/example/lib/CommonKt.class",
                         it + "com/example/lib/MainKt.class",
+                        it + "Script.class",
                         it + "META-INF/new-mpp-lib-with-tests.kotlin_module"
                     )
                 },

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-with-tests/build.gradle

@@ -37,7 +37,8 @@ kotlin {
         }
         configure([main, jvmWithoutJavaMain]) {
         	dependencies {
-        		implementation 'org.jetbrains.kotlin:kotlin-stdlib'
+				implementation 'org.jetbrains.kotlin:kotlin-stdlib'
+        		implementation 'org.jetbrains.kotlin:kotlin-script-runtime'
         	}
         }
         configure([test, jvmWithoutJavaTest]) {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-with-tests/build.gradle.kts.alternative

@@ -29,6 +29,7 @@ kotlin {
         configure(listOf(main, jvmWithoutJavaMain)) {
         	dependencies {
         		implementation(kotlin("stdlib"))
+        		implementation(kotlin("script-runtime"))
         	}
         }
 

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-with-tests/src/jvmWithoutJavaMain/kotlin/script.kts

@@ -0,0 +1,2 @@
+
+val x = 0