Raise user error when Yarn is misconfigured #6221

Job	Run time
Deploy (bundler, bundler)	35s
Deploy (cargo, cargo)	1m 6s
Deploy (composer, composer)	2m 13s
Deploy (docker, docker)	30s
Deploy (elm, elm)	40s
Deploy (git_submodules, gitsubmodule)	27s
Deploy (github_actions, github-actions)	27s
Deploy (go_modules, gomod)	1m 22s
Deploy (gradle, gradle)	37s
Deploy (hex, mix)	1m 25s
Deploy (maven, maven)	34s
Deploy (npm_and_yarn, npm)	1m 6s
Deploy (nuget, nuget)	2m 14s
Deploy (pub, pub)	1m 33s
Deploy (python, pip)	2m 41s
Deploy (swift, swift)	2m 19s
Deploy (terraform, terraform)	42s
	20m 31s

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