Using bundleCommand instead of createCompiler in webpack-cli/serve

[superhit0]

What kind of change does this PR introduce?

bugfix

Did you add tests for your changes?
Need help as this is my first time contributing to webpack

If relevant, did you update the documentation?
N/A

Summary

• The serve command uses webpack-cli but it creates a compiler without options which gives a deprecation warning on webpack@5, this one uses changes the use to bundleCommand, which wraps the callabck inside it

This results in this error - Issue#1918 when we run

• npx webpack-dev-server --watch

Does this PR introduce a breaking change?
No

Other information
@alexander-akait

[snitin315]

npx webpack-dev-server --watch

this is not the right way anymore. webpack-cli serve should be used to invoke webpack-dev-server.

[alexander-akait]

Remove --watch from options, expected

[alexander-akait]

It is invalid fix and break serve command