Ubuntu 26.04 compatibility fixes + sudoers refactor + p4-cache-test host.
- ansible.cfg: switch inventory/log paths from a stale absolute path to
project-relative so the playbook runs from any clone location.
- inventories/p4-sdp-install.yml + host_vars/p4-cache-test.yml: add new
EC2 test host (ec2-3-135-203-141.us-east-2.compute.amazonaws.com) as a
p4d_master with install_broker=false, copy_license=false,
dummy_interface=false, and single-disk volumes on root.
- roles/perforce-sdp-install/tasks/dependencies.yml: write the sysctl
tuning block to /etc/sysctl.d/99-perforce.conf (create: yes) instead
of /etc/sysctl.conf -- Ubuntu 26.04 no longer ships sysctl.conf.
- roles/perforce-sdp-install/handlers/main.yml: restart_sysctl now runs
'sysctl --system' to pick up drop-in files.
- roles/perforce-sdp-install/{tasks/install.yml,tasks/sudo.yml,
templates/sudoers_perforce_user.j2}: replace the
'/bin/systemctl * p4*' rule (rejected by modern sudo as a wildcard in
command args) with a Cmnd_Alias enumerating start/stop/restart/status
/reload/is-active/is-enabled/show for p4d_<id> and p4broker_<id>.
Both task locations now use the same template and validate via
'visudo -cf' before placement.