Sweep fails when target folder does not exist

[BD103]

Found in this run. We should detect if target does not exist, and if so just return early.

Post job cleanup.
Post job cleanup.
Restoring timestamp from state.
Using timestamp: {"secs_since_epoch":1725971506,"nanos_since_epoch":612882228}.
Sweeping unused build files.
/home/runner/.cargo/bin/cargo-sweep sweep --file
Error: Failed to clean "/home/runner/work/bevy-website/bevy-website/target" as it does not exist.
/home/runner/work/_actions/BD103/cargo-sweep/v1/dist/post/index.js:3376
                error = new Error(`The process '${this.toolPath}' failed with exit code ${this.processExitCode}`);
                        ^

Error: The process '/home/runner/.cargo/bin/cargo-sweep' failed with exit code 1
    at ExecState._setResult (/home/runner/work/_actions/BD103/cargo-sweep/v1/dist/post/index.js:3376:25)
    at ExecState.CheckComplete (/home/runner/work/_actions/BD103/cargo-sweep/v1/dist/post/index.js:3359:18)
    at ChildProcess.<anonymous> (/home/runner/work/_actions/BD103/cargo-sweep/v1/dist/post/index.js:3253:27)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at Socket.<anonymous> (node:internal/child_process:457:11)
    at Socket.emit (node:events:519:28)
    at Pipe.<anonymous> (node:net:338:12)