fix: classify git failures on stderr, restrict migration failure detail (#39010)

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

options/locale/locale_en-US.json

@@ -571,8 +571,6 @@
   "form.repository_files_already_exist.adopt": "Files already exist for this repository and can only be adopted.",
   "form.repository_files_already_exist.delete": "Files already exist for this repository. You must delete them.",
   "form.repository_files_already_exist.adopt_or_delete": "Files already exist for this repository. Either adopt them or delete them.",
-  "form.visit_rate_limit": "Remote visit addressed rate limitation.",
-  "form.2fa_auth_required": "Remote visit required two-factor authentication.",
   "form.org_name_been_taken": "The organization name is already taken.",
   "form.team_name_been_taken": "The team name is already taken.",
   "form.team_no_units_error": "Allow access to at least one repository section.",
@@ -603,7 +601,6 @@
   "form.invalid_ssh_principal": "Invalid principal: %s",
   "form.must_use_public_key": "The key you provided is a private key. Please do not upload your private key anywhere. Use your public key instead.",
   "form.unable_verify_ssh_key": "Cannot verify the SSH key. Double-check it for mistakes.",
-  "form.auth_failed": "Authentication failed: %v",
   "form.still_own_repo": "Your account owns one or more repositories. Delete or transfer them first.",
   "form.still_has_org": "Your account is a member of one or more organizations. Leave them first.",
   "form.still_own_packages": "Your account owns one or more packages. Delete them first.",