The `--login-type none` option for `coder users create` is deprecated.
This adds deprecation warnings to all docs that reference it and updates
the CI/CD tutorial to recommend the replacement flows.
Refs DEVEX-224
<details>
<summary>Changes</summary>
- `cli/usercreate.go`: Append deprecation notice to `--login-type` flag
description.
- `docs/tutorials/testing-templates.md`: Replace `--login-type none`
example with separate Premium (`--service-account`) and OSS
(`--login-type password`) examples.
- `docs/reference/cli/users_create.md`: Regenerated from CLI source.
- `cli/testdata/coder_users_create_--help.golden`: Updated golden
snapshot.
</details>
> [!NOTE]
> Generated by Coder Agents.