ci: always build with -Dwerror=true
Selecting the build type as release limits the amount of warnings that are enabled, so ensure we always build with warnings treated as errors so that we don't miss any warning that would happen on debug builds.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Selecting the build type as release limits the amount of warnings that are enabled, so ensure we always build with warnings treated as errors so that we don't miss any warning that would happen on debug builds.