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**Related issue:** Resolves: #35528 (followup)
This migration should fix `.pkg` installers that have a mismatched
software title, as well as software (versions) that are using the wrong
title. It's a little bit risky, as it could modify `software`,
`software_installers`, and `software_titles` data.
For software versions it just checks if the title's source is not the
same as the software. For installers it uses installers with
platform=`darwin` where the title's source isn't `apps`, which should
probably be the only case after the previous migration to convert titles
with source `pkg_packages` to `apps`.
Changefile was already added for 35528 in a previous PR.
# Checklist for submitter
## Testing
- [x] Added/updated automated tests
- [ ] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)
- [x] QA'd all new/changed functionality manually
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