Remove Gradle deprecations

Stop using JavaPluginConvention type and replace outputFile with destinationFile

Issue gh-13864

build.gradle

@@ -88,7 +88,9 @@ tasks.named("dispatchGitHubWorkflow") {
 
 subprojects {
 	plugins.withType(JavaPlugin) {
-		project.sourceCompatibility=JavaVersion.VERSION_17
+		java {
+			sourceCompatibility=JavaVersion.VERSION_17
+		}
 	}
 	tasks.withType(JavaCompile) {
 		options.encoding = "UTF-8"

buildSrc/build.gradle

@@ -4,7 +4,9 @@ plugins {
 	id "groovy"
 }
 
+java {
 	sourceCompatibility = JavaVersion.VERSION_17
+}
 
 repositories {
 	gradlePluginPortal()

core/spring-security-core.gradle

@@ -37,7 +37,7 @@ dependencies {
 }
 
 task springVersion(type: org.gradle.api.tasks.WriteProperties) {
-	outputFile = file("${buildDir}/versions/spring-security.versions")
+	destinationFile = file("${buildDir}/versions/spring-security.versions")
 	property("org.springframework:spring-core", springVersion())
 }