test: Refactor snapshot-only test cases (#13324)

lib/logger/__snapshots__/err-serializer.spec.ts.snap

lib/logger/err-serializer.spec.ts

lib/manager/nvm/__snapshots__/extract.spec.ts.snap

lib/manager/nvm/extract.spec.ts

lib/manager/pipenv/extract.spec.ts

lib/manager/pre-commit/__snapshots__/extract.spec.ts.snap

lib/manager/pre-commit/extract.spec.ts

lib/manager/pub/__snapshots__/extract.spec.ts.snap

lib/manager/pub/extract.spec.ts

lib/manager/pyenv/__snapshots__/extract.spec.ts.snap

lib/manager/pyenv/extract.spec.ts

lib/manager/regex/index.spec.ts

lib/manager/ruby-version/__snapshots__/extract.spec.ts.snap

lib/manager/ruby-version/extract.spec.ts

lib/manager/sbt/__snapshots__/extract.spec.ts.snap

lib/manager/sbt/__snapshots__/update.spec.ts.snap

lib/manager/sbt/extract.spec.ts

lib/manager/sbt/update.spec.ts

lib/manager/setup-cfg/extract.spec.ts

...ager/terraform-version/__snapshots__/extract.spec.ts.snap