Make Project.prop(name: String) use providers.gradleProperty instead of properties

Author: lauzadis

build-plugins/build-support/src/main/kotlin/aws/sdk/kotlin/gradle/util/ProjectExt.kt

@@ -45,7 +45,7 @@ public fun Project.localProperties(): Map<String, Any> {
  * * property from extras
  * @return property if it exists or null
  */
-public fun Project.prop(name: String): Any? = properties[name] ?: localProperties()[name] ?: extra.getOrNull(name)
+public fun Project.prop(name: String): Any? = providers.gradleProperty(name).orNull ?: localProperties()[name] ?: extra.getOrNull(name)
 
 inline fun <reified T> Project.typedProp(name: String): T? {
     val any = prop(name)