Change `sdk-sync` failure to warning to help release decoupling (#1494)

use crate::fs::{DefaultFs, Fs};

use crate::git::{Commit, Git, GitCLI};

use crate::versions::{DefaultVersions, Versions, VersionsManifest};

use anyhow::{bail, Context, Result};

use anyhow::{Context, Result};

use smithy_rs_tool_common::macros::here;

use std::collections::BTreeSet;

use std::path::{Path, PathBuf};

use std::thread;

use std::time::Duration;

use systemstat::{ByteSize, Platform, System};

use tracing::{debug, info, info_span};

use tracing::{debug, info, info_span, warn};

use tracing_attributes::instrument;

pub mod gen;

            .find_handwritten_files_and_folders(self.aws_sdk_rust.path(), generated_sdk_path)

            .context(here!())?;

        if !handwritten_files_in_generated_sdk_folder.is_empty() {

            bail!(

            // TODO(https://github.com/awslabs/smithy-rs/issues/1493): This can be changed back to `bail!` after release decoupling is completed

            warn!(

                "found one or more 'handwritten' files/folders in generated code: {:#?}\nhint: if this file is newly generated, remove it from .handwritten",

                handwritten_files_in_generated_sdk_folder

            );