Fix system test runtime classpath and build scan notification

See gh-25824

ci/tasks/run-system-tests.yml

@@ -2,6 +2,8 @@
 platform: linux
 inputs:
 - name: git-repo
+outputs:
+- name: git-repo
 caches:
 - path: gradle
 params:

spring-boot-system-tests/spring-boot-image-tests/build.gradle

@@ -28,7 +28,14 @@ dependencies {
 	systemTestImplementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-test"))
 	systemTestImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-test-support"))
 	systemTestImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-buildpack-platform"))
+	systemTestImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-loader-tools"))
+	systemTestImplementation("io.spring.gradle:dependency-management-plugin")
 	systemTestImplementation(gradleTestKit())
+	systemTestImplementation("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
+	systemTestImplementation("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
+	systemTestImplementation("org.jetbrains.kotlin:kotlin-compiler-embeddable:$kotlinVersion")
+	systemTestImplementation("org.jetbrains.kotlin:kotlin-compiler-runner:$kotlinVersion")
+	systemTestImplementation("org.jetbrains.kotlin:kotlin-daemon-client:$kotlinVersion")
 	systemTestImplementation("org.assertj:assertj-core")
 	systemTestImplementation("org.testcontainers:junit-jupiter")
 	systemTestImplementation("org.testcontainers:testcontainers")