Polish "Use project.getLayout().getBuildDirectory() instead of getBuildDir()"

See gh-37167

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-basicExecution.gradle

@@ -5,7 +5,6 @@ plugins {
 version = '0.1.0'
 
 task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
-	destinationDir project.buildDir
 	properties {
 		artifact = 'foo'
 		group = 'foo'

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-removePropertiesUsingEmptyStrings.gradle

@@ -6,7 +6,6 @@ group = 'foo'
 version = '0.1.0'
 
 task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
-	destinationDir project.buildDir
 	properties {
 		group = ''
 		artifact = ''

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-removePropertiesUsingNulls.gradle

@@ -6,7 +6,6 @@ group = 'foo'
 version = '0.1.0'
 
 task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
-	destinationDir project.buildDir
 	properties {
 		group = null
 		artifact = null

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/BootJarIntegrationTests-explodedApplicationClasspath.gradle

@@ -15,7 +15,7 @@ dependencies {
 
 task explode(type: Sync) {
 	dependsOn(bootJar)
-	destinationDir = file("$buildDir/exploded")
+	destinationDir = layout.buildDirectory.dir("exploded").get().asFile
 	from zipTree(files(bootJar).singleFile)
 }
 

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/MavenIntegrationTests-bootJarCanBeUploaded.gradle

@@ -14,7 +14,7 @@ version = '1.0'
 uploadBootArchives {
 	repositories {
 		mavenDeployer {
-		 	repository(url: "file:${buildDir}/repo")
+		 	repository(url: "file:${layout.buildDirectory.dir("repo").get().asFile}")
 		}
 	}
 }

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/MavenIntegrationTests-bootWarCanBeUploaded.gradle

@@ -14,7 +14,7 @@ version = '1.0'
 uploadBootArchives {
 	repositories {
 		mavenDeployer {
-		 	repository(url: "file:${buildDir}/repo")
+			repository(url: "file:${layout.buildDirectory.dir("repo").get().asFile}")
 		}
 	}
 }

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/MavenPublishingIntegrationTests-bootJarCanBePublished.gradle

@@ -14,7 +14,7 @@ version = '1.0'
 publishing {
 	repositories {
 		maven {
-			url "${buildDir}/repo"
+			url = layout.buildDirectory.dir("repo")
 		}
 	}
 	publications {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/bundling/MavenPublishingIntegrationTests-bootWarCanBePublished.gradle

@@ -14,7 +14,7 @@ version = '1.0'
 publishing {
 	repositories {
 		maven {
-			url "${buildDir}/repo"
+			url = layout.buildDirectory.dir("repo")
 		}
 	}
 	publications {