[linter] Improve do_not_use_environment lint error message and documentation#60970

samuelkchris wants to merge 2 commits intodart-lang:maindart-lang/sdk:mainfrom

samuelkchris:fix-do-not-use-environment-lint-messagesamuelkchris/sdk:fix-do-not-use-environment-lint-messageCopy head branch name to clipboard