Unify the printing of the logs between bar-with-logs and raw

Make the printing of the build logs systematically go through the
logger, and replicate the behavior of `no-build-output` by having two
different loggers (one that prints the build logs and one that doesn't)

src/libmain/shared.cc

@@ -2,6 +2,7 @@
 #include "shared.hh"
 #include "store-api.hh"
 #include "util.hh"
+#include "loggers.hh"
 
 #include <algorithm>
 #include <cctype>
@@ -169,7 +170,7 @@ LegacyArgs::LegacyArgs(const std::string & programName,
         .longName = "no-build-output",
         .shortName = 'Q',
         .description = "do not show build output",
-        .handler = {&settings.verboseBuild, false},
+        .handler = {[&]() {setLogFormat(LogFormat::raw); }},
     });
 
     addFlag({