Bring back kotlin-script-runtime dependency

See gh-24171

spring-webflux/spring-webflux.gradle

@@ -47,6 +47,7 @@ dependencies {
 	testCompile('org.apache.httpcomponents.client5:httpclient5:5.0')
 	testCompile('org.apache.httpcomponents.core5:httpcore5-reactive:5.0')
 	testCompile("com.squareup.okhttp3:mockwebserver")
+	testCompile("org.jetbrains.kotlin:kotlin-script-runtime")
 	testRuntime("org.jetbrains.kotlin:kotlin-scripting-jsr223")
 	testRuntime("org.jruby:jruby")
 	testRuntime("org.python:jython-standalone")

spring-webmvc/spring-webmvc.gradle

@@ -60,6 +60,7 @@ dependencies {
 	testCompile("javax.validation:validation-api")
 	testCompile("io.projectreactor:reactor-core")
 	testCompile("io.reactivex.rxjava3:rxjava")
+	testCompile("org.jetbrains.kotlin:kotlin-script-runtime")
 	testRuntime("org.jetbrains.kotlin:kotlin-scripting-jsr223")
 	testRuntime("org.jetbrains.kotlinx:kotlinx-coroutines-core") // Temporary dependency to fix a NoClassDefFoundError error, should not be necessary
 	testRuntime("org.jruby:jruby")