ci: don't try to install for a fuzz build

Currently the manpages are installed, but that is a bug. An upcoming commit
will avoid installing manpages for targets that aren't configured, which
removes the "install" target for fuzz builds.

ci/test/00_setup_env_mac_native_fuzz.sh

@@ -14,3 +14,4 @@ export OSX_SDK=""
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
 export RUN_FUZZ_TESTS=true
+export GOAL="all"