Disable ninja as it breaks build otherwise due to using ExternalProject
cmake module instead of FetchContent for par2turbo dependency build.
Remove post-stage-PAR2-on as it is no longer necessary.
Add pre-configure-PAR2-on to move the par2build source directory into
the correct place and allow it to be built offline.
Changelog: https://github.com/nzbgetcom/nzbget/releases/tag/v24.5
PR: 283884
Approved by: submitter is maintainer
Alex Levy
e7de0348e8