feat(`anvil`): `--compute-units-per-second` should not be ignored on local Anvil fork

Running an anvil fork as follows:

```bash
anvil --version
# anvil 0.2.0 (e5dbb7a 2024-12-03T00:24:42.571016376Z)
anvil -f $ALCHEMY_URL --compute-units-per-second 100
```

And launching a fork test on it as follows:
```bash
forge --version
# forge 0.2.0 (e5dbb7a 2024-12-03T00:24:42.577356416Z)
forge test --rpc-url=http://localhost:8545 --compute-units-per-second 100
```

Seems to ignore the CUPS value.
The problem is even more visible when the fork is created against a more heavily rate-limited RPC where even with a CUPS value of 1, the fork quickly gets 429 errors and the *request logs show no sign of throttling*