refactor: remove client.transport in favor of client.webSocketTransport

[snitin315]

• 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?

Yes

Motivation / Use-Case

remove client.transport in favor of client.webSocketTransPort

Breaking Changes

yes, client.transport was removed in favor of client.webSocketTransPort

Additional Info

None

[alexander-akait]

Let's fix CI

[codecov]

Codecov Report

Merging #3525 (5dc7c29) into master (9a1edc1) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #3525   +/-   ##
=======================================
  Coverage   94.09%   94.09%           
=======================================
  Files          20       20           
  Lines        1287     1287           
  Branches      426      426           
=======================================
  Hits         1211     1211           
  Misses         71       71           
  Partials        5        5           

Impacted Files	Coverage Δ
bin/cli-flags.js	100.00% <ø> (ø)
lib/utils/DevServerPlugin.js	99.27% <100.00%> (ø)

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