build: update dependency webpack-dev-server to v6 #4070

Job	Run time
list	45s
workflow (devkit-core-tests)	1m 33s
workflow (modules-builder-tests)	2m 20s
workflow (build-unit-tests)	2m 29s
workflow (build-cli)	1m 53s
workflow (devkit-core-tests-rerun)	1m 56s
	10m 56s

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