* Upadate dev container to use EL10
* Update CI to use EL10
* Update spec file for EL10
* Add `make rpm` target for building RPMs
* Use `mktemp` for `make dist` to use devcontainer filesystem
* Set default dhcpd and tftpd to dnsmasq for EL10
* Fix dnsmasq template tftp paths to use basename
Signed-off-by: Timothy Middelkoop <tmiddelkoop@internet2.edu>