VPP: List software update to include available Apps

[georgekarrv]

PR https://github.com/fleetdm/fleet/pull/20445:

• [x] Update List Software to include VPP apps as available: https://github.com/fleetdm/fleet/pull/19291/files#diff-7246bc304b15c8865ed8eaa205e9c244d0a0314e4bae60cf553dc06147c38b64R8266 (partly done, waiting for feedback on https://fleetdm.slack.com/archives/C03C41L5YEL/p1720547940629749 feedback received, see https://github.com/fleetdm/fleet/pull/19291/files#r1672582141)

• [x] Update Get Software Title to include the associated VPP app: https://www.figma.com/design/QsO3Q03QGVbiSknGpLqgAB/%2318867-Install-Apple-App-Store-apps-on-macOS?node-id=494-9761&t=CZSC7fqx4BFULXjJ-0

PR: https://github.com/fleetdm/fleet/pull/20483

• [x] Update List Host Software to include VPP apps as available: https://www.figma.com/design/QsO3Q03QGVbiSknGpLqgAB/%2318867-Install-Apple-App-Store-apps-on-macOS?node-id=367-7237&t=CZSC7fqx4BFULXjJ-0
• [x] Update List My Device Software to include VPP apps as available (should be same endpoint as above, but adding just to make sure)

---

After the first two PRs were ready, some late changes required (will make them in another PR):

PR: https://github.com/fleetdm/fleet/pull/20519

• [x] Update "List host's software" (see https://github.com/fleetdm/fleet/pull/19291/files#r1679854564) :

  Instead of having package_available_for_software to have available_for_install + additional object for package or VPP app, same as we do for GET /software/titles/:id (one of them is always null ).

• [x] Update "List My Device's software":
  • Same, but replace the existing package object by the software_package or app_store_app.
  • This will unify the My Device's software with Host's software so both endpoints are exactly the same payload-wise.

[georgekarrv]

Hey team! Please add your planning poker estimate with Zenhub @dantecatalfamo @ghernandez345 @gillespi314 @mna @roperzh

[mna]

The changes for Get Software Title were not planned when this was estimated, and the query to get the status counts (installed, pending and failed) will be quite tricky as installation is an MDM command. I think this is a good 5 now, I'll update the estimate.

[fleet-release]

VPP apps now seen, In our software's list gleaned, Fleet's reach is serene.