Delete temp directory after MavenBuild has exected

Closes gh-33083

Author: wilkinsona

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/MavenBuild.java

@@ -45,6 +45,8 @@
 import org.apache.maven.shared.invoker.Invoker;
 import org.apache.maven.shared.invoker.MavenInvocationException;
 
+import org.springframework.util.FileSystemUtils;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.contentOf;
 
@@ -195,6 +197,9 @@ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IO
 		catch (Exception ex) {
 			throw new RuntimeException(ex);
 		}
+		finally {
+			FileSystemUtils.deleteRecursively(this.temp);
+		}
 	}
 
 	/**