Revert accidental changes to CoreRustSettings.kt and Cargo.lock

Author: Fahad Zubair

codegen-core/src/main/kotlin/software/amazon/smithy/rust/codegen/core/smithy/CoreRustSettings.kt

@@ -46,7 +46,7 @@ open class CoreCodegenConfig(
 ) {
     companion object {
         const val DEFAULT_FORMAT_TIMEOUT_SECONDS = 20
-        const val DEFAULT_DEBUG_MODE = true
+        const val DEFAULT_DEBUG_MODE = false
         const val DEFAULT_FLATTEN_MODE = false
 
         fun fromNode(node: Optional<ObjectNode>): CoreCodegenConfig =