Also ensures we run integration tests when docker-compose files used by
`fleetctl preview` are changed, so we don't merge any more test failures
due to those.
Fixes#29216. No changes file as this is just a `docker-compose` change
so this will work with existing Fleet releases.
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Manual QA for all new/changed functionality
By default, we shouldn't override FMA manifest locations, and these
overrides pinned manifests to a specific, outdated commit. Stray lines
added in 1353b9cbc4, merged as part of
#20974.
#15563
- [X] Manual QA for all new/changed functionality
Tested by running the following:
If the changes haven't been merged to `main`:
```sh
fleetctl preview --preview-config 15563-move-external-dep-osquery-in-a-box-to-monorepo
fleetctl preview stop
fleetctl preview reset
```
If the changes were already merged to `main`:
```sh
fleetctl preview
fleetctl preview stop
fleetctl preview reset
```
