fix: Add Smithy smoke test APIs to project (#695)

Author: jbelkins

smithy-swift-codegen/build.gradle.kts

@@ -28,6 +28,8 @@ dependencies {
     implementation(kotlin("stdlib-jdk8"))
     api("software.amazon.smithy:smithy-codegen-core:$smithyVersion")
     api("software.amazon.smithy:smithy-waiters:$smithyVersion")
+    api("software.amazon.smithy:smithy-smoke-test-traits:${smithyVersion}")
+    api("software.amazon.smithy:smithy-aws-smoke-test-model:${smithyVersion}")
     api("com.atlassian.commonmark:commonmark:$commonMarkParserVersion")
     api("org.jsoup:jsoup:$jsoupVersion")
     implementation("software.amazon.smithy:smithy-protocol-test-traits:$smithyVersion")