Added `gigs_total_disk_space` to host endpoint responses.
- Now user will know host disk size even when disk is full
(percent_disk_space_available==0)
#15058
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [x] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [x] Added support on fleet's osquery simulator `cmd/osquery-perf` for
new osquery data ingestion features.
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality
ce8eb74897