Put webpack-cli serve flags in dev server

[knagaitsev]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

N/A

Motivation / Use-Case

Flags for webpack-cli serve need to be present on webpack-dev-server to be maintained. It is better if they are on master so that they can be part of a release, then webpack-cli next can access them easily.

The flags here may not be perfectly up-to-date, I will bring them up to date before merge.

Breaking Changes

None

Additional Info

[codecov]

Codecov Report

Merging #2270 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #2270   +/-   ##
======================================
  Coverage    93.9%   93.9%           
======================================
  Files          34      34           
  Lines        1280    1280           
  Branches      365     368    +3     
======================================
  Hits         1202    1202           
  Misses         71      71           
  Partials        7       7

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[alexander-akait]

Good job!