refactor: remove experimental Jest and Web Test Runner builders #3082

Job	Run time
list	31s
workflow (build-unit-tests)	2m 25s
workflow (modules-builder-tests)	2m 3s
workflow (devkit-core-tests-rerun)	1m 29s
workflow (build-cli)	1m 40s
workflow (devkit-core-tests)	1m 20s
	9m 28s

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