Upgrade to latest build plugin / remove explicit Kotlin dependencies

Author: lauzadis

codegen/smithy-kotlin-codegen-testutils/build.gradle.kts

@@ -21,7 +21,6 @@ group = "software.amazon.smithy.kotlin"
 version = codegenVersion
 
 dependencies {
-    implementation(kotlin("stdlib-jdk8"))
     implementation(libs.smithy.aws.traits)
     implementation(libs.smithy.protocol.traits)
     api(project(":codegen:smithy-kotlin-codegen"))

codegen/smithy-kotlin-codegen/build.gradle.kts

@@ -24,7 +24,6 @@ val sdkVersion: String by project
 val runtimeVersion = sdkVersion
 
 dependencies {
-    implementation(kotlin("stdlib-jdk8"))
     api(libs.smithy.codegen.core)
     api(libs.smithy.waiters)
     implementation(libs.smithy.rules.engine)

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 kotlin-version = "2.0.21"
 dokka-version = "1.9.10"
 
-aws-kotlin-repo-tools-version = "0.4.12"
+aws-kotlin-repo-tools-version = "0.4.13"
 
 # libs
 coroutines-version = "1.9.0"