Resolves#44088.
- [X] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- [X] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.
## Testing
- [X] Added/updated automated tests
- [X] QA'd all new/changed functionality manually.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added Linux as a label platform option.
* Linux labels now apply across supported distributions, including
Ubuntu, Debian, RHEL, CentOS, and generic Linux hosts.
* Updated platform names for improved clarity and consistency.
* **Bug Fixes**
* Improved platform matching so Linux labels apply consistently to
compatible hosts.
* Removed the obsolete Zorin platform option.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->