Update to Kotlin 1.9.0

Closes gh-13539

build.gradle

@@ -5,7 +5,7 @@ buildscript {
 		classpath "io.spring.javaformat:spring-javaformat-gradle-plugin:$springJavaformatVersion"
 		classpath 'io.spring.nohttp:nohttp-gradle:0.0.11'
 		classpath "io.freefair.gradle:aspectj-plugin:6.6.3"
-		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
+		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinBuildDependencyVersion"
 		classpath "com.netflix.nebula:nebula-project-plugin:8.2.0"
 	}
 	repositories {

dependencies/spring-security-dependencies.gradle

@@ -13,7 +13,7 @@ dependencies {
 	api platform("org.junit:junit-bom:5.10.0-RC1")
 	api platform("org.mockito:mockito-bom:4.11.0")
 	api platform("org.springframework.data:spring-data-bom:2022.0.7")
-	api platform("org.jetbrains.kotlin:kotlin-bom:$kotlinVersion")
+	api platform("org.jetbrains.kotlin:kotlin-bom:$kotlinDependencyVersion")
 	api platform("org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.7.2")
 	api platform("com.fasterxml.jackson:jackson-bom:2.15.2")
 	constraints {

gradle.properties

@@ -6,7 +6,8 @@ springFrameworkVersion=6.1.0-M2
 micrometerVersion=1.12.0-M1
 openSamlVersion=4.3.0
 version=6.2.0-SNAPSHOT
-kotlinVersion=1.8.22
+kotlinBuildDependencyVersion=1.8.22
+kotlinDependencyVersion=1.9.0
 samplesBranch=main
 org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true