[docker/cli] fix: restore os.Args after plugin completion and fix error return

### ROOT CAUSE When a plugin is invoked, the plugin's execution may temporarily modify `os.Args` for its own command-line processing. However, if the plugin fails, the modified `os.Args` might remain, potentially affecting subsequent operations. Additionally, the plugin's error handling might not be properly propagated, leading to silent failures. The fix involves restoring `os.Args` after plugin execution and ensuring errors are returned properly. ### CODE FIX ```go // Before plugin invocation originalArgs := make([]string, len(os.Args)) copy(originalArgs, os.Args) // After plugin invocation defer func() { os.Args = originalArgs // Restore original Args }() // ... plugin invocation code ... // Ensure errors are returned if err := plugin.Invoke(); err != nil { return err } ```