Include spring-boot-starter-parent in Integration tests repository

This commit makes sure that integration tests for the Maven Plugin have
access to the current "spring-boot-starter-parent" pom and its
hierarchy as new integration tests rely on that.

Closes gh-42000

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/build.gradle

@@ -59,9 +59,11 @@ dependencies {
 	intTestImplementation("org.junit.jupiter:junit-jupiter")
 
 	mavenRepository(project(path: ":spring-boot-project:spring-boot", configuration: "mavenRepository"))
+	mavenRepository(project(path: ":spring-boot-project:spring-boot-dependencies", configuration: "mavenRepository"))
 	mavenRepository(project(path: ":spring-boot-project:spring-boot-test", configuration: "mavenRepository"))
 	mavenRepository(project(path: ":spring-boot-project:spring-boot-devtools", configuration: "mavenRepository"))
 	mavenRepository(project(path: ":spring-boot-project:spring-boot-docker-compose", configuration: "mavenRepository"))
+	mavenRepository(project(path: ":spring-boot-project:spring-boot-starters:spring-boot-starter-parent", configuration: "mavenRepository"))
 
 	optional("org.apache.maven.plugins:maven-shade-plugin") {
 		exclude(group: "javax.annotation", module: "javax.annotation-api")