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 tweak the iteration count on all our fuzz jobs to
get them running in more consistent times.

Further, 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

@@ -14,6 +14,8 @@ rm *_target.rs
 popd
 
 cargo install --color always --force honggfuzz --no-default-features
+# Because we're fuzzing relatively few iterations, the maximum possible
+# compiler optimizations aren't necessary, so switch to defaults.
 sed -i 's/lto = true//' Cargo.toml
 
 export RUSTFLAGS="--cfg=secp256k1_fuzz --cfg=hashes_fuzz"
@@ -25,11 +27,13 @@ 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="$HFUZZ_RUN_ARGS -F 64 -N100000"
-	elif [ "$FILE" = "full_stack_target" ]; then
-		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -t0 -N1000000"
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -F 64 -N5000"
+	elif [ "$FILE" = "process_network_graph_target" -o "$FILE" = "full_stack_target" -o "$FILE" = "router_target" ]; then
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N50000"
+	elif [ "$FILE" = "indexedmap_target" ]; then
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N500000"
 	else
-		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N1000000"
+		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -N2500000"
 	fi
 	export HFUZZ_RUN_ARGS
 	cargo --color always hfuzz run $FILE