Avoid duplicates with different versions in Devtools' int test deps

Closes gh-22887

spring-boot-project/spring-boot-devtools/build.gradle

@@ -76,7 +76,7 @@ dependencies {
 	testRuntimeOnly("org.yaml:snakeyaml")
 }
 
-task copyIntTestDependencies(type: Copy) {
+task syncIntTestDependencies(type: Sync) {
 	destinationDir = file("${buildDir}/dependencies")
 	from {
 		configurations.intTestDependencies
@@ -85,5 +85,5 @@ task copyIntTestDependencies(type: Copy) {
 }
 
 intTest {
-	dependsOn copyIntTestDependencies
+	dependsOn syncIntTestDependencies
 }