We need something similar to [this](https://github.com/aws/aws-sdk-java-v2/blob/0e278313586b91301d2936cfc18f3b18f7a40111/utils/src/main/java/software/amazon/awssdk/utils/internal/SystemSettingUtils.java#L44) for [AwsSdkSetting](https://github.com/awslabs/aws-sdk-kotlin/blob/f05c7b1141133231ac5b7045b35b0c4fb4ea68ab/aws-runtime/aws-core/common/src/aws/sdk/kotlin/runtime/AwsSdkSetting.kt) so that reading of these values is littered with platform specific call chains everywhere.