Add WebTestClient infrastructure to GraphQL test starter

Closes gh-47849

smoke-test/spring-boot-smoke-test-graphql/build.gradle

@@ -25,7 +25,6 @@ dependencies {
 	implementation(project(":starter:spring-boot-starter-security"))
 	implementation(project(":starter:spring-boot-starter-webmvc"))
 
-	testImplementation(project(":module:spring-boot-webtestclient"))
 	testImplementation(project(":starter:spring-boot-starter-graphql-test"))
 	testImplementation(project(":starter:spring-boot-starter-webmvc-test"))
 }

starter/spring-boot-starter-graphql-test/build.gradle

@@ -26,4 +26,5 @@ dependencies {
 	api(project(":starter:spring-boot-starter-jackson-test"))
 
 	api(project(":module:spring-boot-graphql-test"))
+	api(project(":module:spring-boot-webtestclient"))
 }