On TrueNAS SCALE 24.04+, the root filesystem including /usr/local/bin
is read-only. The installer now tries multiple locations for the
runtime binary:
1. Execute directly from /data (if no noexec mount)
2. /usr/local/bin (older TrueNAS versions)
3. /root/bin (TrueNAS SCALE 24.04+)
4. /var/tmp (last resort)
The bootstrap script is also updated to use the determined runtime
location rather than hardcoding /usr/local/bin.
Related to #801
rcourtman
610be6914c