Reduce CI fuzz iterations as we're now timing out

When we made `test_node_counter_consistency` more aggressively
run, our `process_network_graph` fuzzer got materially slower,
resulting in consistent fuzz CI job timeouts.

Thus, here, we reduce the iteration count on
`process_network_graph` (and `chanmon_consistency`) to get our
fuzz job passing again.

Finally, we further reduce `full_stack_target` iterations in
anticipation of a later commit which will start using our
hard-coded fuzz seeds, creating substantially more coverage and
slowing down fuzzing iterations.

Author: TheBlueMatt

fuzz/ci-fuzz.sh

@@ -25,11 +25,13 @@ for TARGET in src/bin/*.rs; do
 	FILE="${FILENAME%.*}"
 	HFUZZ_RUN_ARGS="--exit_upon_crash -v -n2"
 	if [ "$FILE" = "chanmon_consistency_target" ]; then
-		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -F 64 -N100000"
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -F 64 -N10000"
+	elif [ "$FILE" = "process_network_graph_target" ]; then
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N50000"
 	elif [ "$FILE" = "full_stack_target" ]; then
-		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -t0 -N1000000"
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N50000"
 	else
-		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N1000000"
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N5000000"
 	fi
 	export HFUZZ_RUN_ARGS
 	cargo --color always hfuzz run $FILE