env: Removed parse_errors to follow other commands standard with "thiserror" + added errors test case#7584

sylvestre merged 3 commits intouutils:mainuutils/coreutils:mainfrom

ValentinBoudevin:7535_env_move_to_use_thiserrorValentinBoudevin/coreutils:7535_env_move_to_use_thiserrorCopy head branch name to clipboard