Track provision status on network locations to limit visibility

[bjester]

Summary

• Adds a new field is_provisioned on Network Locations to track whether a device is provisioned
• Updates the device info data structure and API to report whether it's provisioned (now v4)
• Updates network location processing to set is_provisioned falling back to a facilities query if the device's info does not contain the key
• Filters out unprovisioned devices from the list API when queried with syncable=1 flag (note: this still allows them to show up in content import flows)

References

closes #14726

Reviewer guidance

1. Run 2 or more devices, one of them not yet provisioned
2. Verify the unprovisioned devices do not show up in device selection from other devices
3. Verify that once the device is provisioned, it shows up, without needing to restart Kolibri

AI usage

Implemented the changes myself, then allowed AI to add tests to cover my changes. I requested more coverage upon review of the tests.

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.19.4b0.dev0_git.21.g482eea7d.pex
Windows Installer (EXE)	kolibri-0.19.4b0.dev0+git.21.g482eea7d-windows-setup-unsigned.exe
Debian Package	kolibri_0.19.4b0.dev0+git.21.g482eea7d-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.19.4b0.dev0+git.21.g482eea7d.dmg
Android Package (APK)	kolibri-0.19.4b0.dev0+git.21.g482eea7d-0.1.10-debug.apk
Raspberry Pi Image	kolibri-pi-image-0.19.4b0.dev0+git.21.g482eea7d.zip
TAR file	kolibri-0.19.4b0.dev0+git.21.g482eea7d.tar.gz
WHL file	kolibri-0.19.4b0.dev0+git.21.g482eea7d-py2.py3-none-any.whl

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