Output directory is deleted when keepOutputDirectory is true

[daryl-c]

This is a (Bug Report)

Description

• What went wrong?
  Bug. Output directory is being deleted when keepOutputDirectory flag is being passed as true

• What did you expect should have happened?
  Output directory to be kept

• What was the config you used?

  custom: {
    webpack: {
      keepOutputDirectory: true,
      webpackConfig: './webpack.config.js',
      includeModules: true,
    },
  },

• What stacktrace or error message from your provider did you see?
  None

Similar or dependent issue(s):

• #12345

Additional Data

• Serverless-Webpack Version you're using: 5.4.0
• Webpack version you're using: 5.28.0
• Serverless Framework Version you're using: 2.22.0
• Operating System: MacOS 11.2.3
• Stack Trace (if available): N/A