fuzz: Set -rss_limit_mb=8000 for generate as well

This is set by merge, so set it here as well, to avoid OOM.

Author: MarcoFalke

test/fuzz/test_runner.py

@@ -268,6 +268,7 @@ def job(command, t, t_env):
         use_value_profile = int(random.random() < .3)
         command = [
             os.path.join(build_dir, 'src', 'test', 'fuzz', 'fuzz'),
+            "-rss_limit_mb=8000",
             "-max_total_time=6000",
             "-reload=0",
             f"-use_value_profile={use_value_profile}",