Resolves#44970 (1/2).
---
- [X] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- [X] Added/updated automated tests
- [X] QA'd all new/changed functionality manually
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## Summary by CodeRabbit
* **Bug Fixes**
* `fleetctl get fleets` / `get teams` now display software and setup
experience from authoritative software endpoints.
* Preserve literal setup_experience fields (avoid erroneous macos_setup
renames) when applying and when transmitting JSON for software entries.
* **Tests**
* Added regression tests and test helpers to ensure
software/setup_experience are sourced correctly and to prevent nil
panics in related tests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Lucas Manuel Rodriguez
9032883b47