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**Related issue:** For #41091
# Details
This PR finishes the work of aliasing multi-platform keys by:
* Added the renames to the list maintained by generate-gitops so that
`fleetctl get` can use the new names
* Updated the code that adds the new names to API and `fleetctl get`
output to only add new nested keys under new parents, e.g. add
`apple_settings.configuration_profiles`, but not
`macos_settings.configuration_profiles`.
The API key duplicator now runs through `RewriteDeprecatedKeys` which is
a little heavier per-token, but for old keys we're doing less work so I
think this ends up being slightly more performant than before, at least
for large payloads.
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [ ] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
n/a, changelog for new keys added in previous PR
## Testing
- [X] Added/updated automated tests
updated tests for the duplicators
- [X] QA'd all new/changed functionality manually
- [X] `/config` and `/fleets` APIs now only return new keys under new
parents
- [X] `fleetctl get fleets` now returns new multiplatform keys