pidfile should not be added to global config when using systemd

[h-haaks]

Describe the Bug

The default global_options in params.pp contains 'pidfile' which since haproxy 2.8 results in the following warning when haproxy is started as a systemd service.

[WARNING]  (124314) : config : parsing [/etc/haproxy/haproxy.cfg:9] : 'pidfile' already specified. Continuing.

Expected Behavior

When haproxy is started with '-p ' on the command line 'pidfile' should not be added to global config.

Environment

• Platform Rockylinux 10

[h-haaks]

Workaround:
Set merge_options to false and configure all global and default options as input.