use fxhash - TEST ONLY

[lrubasze]

Summary

INSTRUCTIONS:
Add summary - one or two sentences explaining the purpose of this PR.

Details

INSTRUCTIONS:
Provide further details about the changes, or how they fit into the roadmap.
You can delete this section if it's not useful.

Testing

INSTRUCTIONS:
Further details about the tests you've added or manually performed.
You can delete this section if it's not useful.

Update Recommendations

INSTRUCTIONS:
This section is to provide recommendations to consumers of this repo about how they
should handle breaking changes, or integrate new features. The two key stakeholder
groups are dApp Developers and Internal Integrators, and there are separate sections
for each.

In order to allow us to compile aggregated update instructions across PRs, please tag the PR
with 0+ of the relevant labels:
* scrypto-lib - Any change to the scrypto library
* sbor - Any breaking change to SBOR encoding/decoding
* manifest - Any change to manifest display, compilation/decompilation
* transaction - Any change which affects the compiled manifest, or transaction semantics
* substate - Any change to substates, the state model, or what's stored in the DB
* native-blueprint-interface - Any change to the interface of native blueprints
* files-moved - Any change to where engine types have moved, which will require
  internal integrators to update their imports

If you have a breaking change which doesn't fix into a category above, then tag it with
the closest label, and discuss in slack/discord.

If your PR contains no breaking changes or new features or hasn't been tagged, this whole
section can be deleted.

For dApp Developers

INSTRUCTIONS:
Migration recommendations for a dApp developer to update their dApp/integrations
due to to the change/s in this PR.

These will be aggregated by the Developer Ecosystem team and included in the next Scrypto migration guide
(eg https://docs-babylon.radixdlt.com/main/scrypto/release_notes/migrating_from_0.7_to_0.8.html )

For Internal Integrators

INSTRUCTIONS:
Instructions to any internal integrations (eg Node, Toolkit, Gateway, Ledger App) for how the changes may affect
them and recommendations for how they should update to support this change.

[github-actions]

Phylum Report Link

[github-actions]

Docker tags
docker.io/radixdlt/private-scrypto-builder:36b35739ed

[github-actions]

Benchmark for 36b3573

Click to view benchmark

Test	Base	PR	%
costing::bench_prepare_wasm	44.9±0.09ms	44.4±0.26ms	-1.11%
costing::decode_encoded_i8_array_to_manifest_raw_value	19.6±0.11ms	19.1±0.05ms	-2.55%
costing::decode_encoded_i8_array_to_manifest_value	41.5±0.06ms	41.7±0.11ms	+0.48%
costing::decode_encoded_tuple_array_to_manifest_raw_value	72.2±0.11ms	70.8±0.14ms	-1.94%
costing::decode_encoded_tuple_array_to_manifest_value	99.0±0.33ms	100.9±0.16ms	+1.92%
costing::decode_encoded_u8_array_to_manifest_raw_value	32.4±0.15µs	26.0±0.15µs	-19.75%
costing::decode_encoded_u8_array_to_manifest_value	41.4±0.10ms	41.7±0.10ms	+0.72%
costing::decode_rpd_to_manifest_raw_value	15.2±0.04µs	14.1±0.03µs	-7.24%
costing::decode_rpd_to_manifest_value	10.9±0.07µs	10.9±0.05µs	0.00%
costing::deserialize_wasm	1299.4±4.56µs	1274.8±3.43µs	-1.89%
costing::execute_transaction_creating_big_vec_substates	695.8±8.59ms	697.1±7.43ms	+0.19%
costing::execute_transaction_reading_big_vec_substates	587.0±1.62ms	583.1±2.09ms	-0.66%
costing::instantiate_flash_loan	997.3±1080.15µs	975.3±1404.49µs	-2.21%
costing::instantiate_radiswap	892.0±334.34µs	864.8±275.68µs	-3.05%
costing::spin_loop	21.7±0.06ms	21.1±0.04ms	-2.76%
costing::spin_loop_v2	3.0±0.00s	3.1±0.00s	+3.33%
costing::spin_loop_v3	734.1±6.11ms	728.5±8.32ms	-0.76%
costing::validate_sbor_payload	32.5±0.12µs	30.9±0.09µs	-4.92%
costing::validate_sbor_payload_bytes	263.7±0.73ns	245.7±0.63ns	-6.83%
costing::validate_secp256k1	76.7±0.13µs	76.6±0.20µs	-0.13%
costing::validate_wasm	34.4±0.04ms	33.8±0.04ms	-1.74%
decimal::add/0	8.4±0.00ns	8.4±0.00ns	0.00%
decimal::add/rust-native	9.9±0.01ns	9.9±0.01ns	0.00%
decimal::add/wasmi	221.1±0.89ns	224.9±0.52ns	+1.72%
decimal::add/wasmi-call-native	2.1±0.01µs	2.2±0.00µs	+4.76%
decimal::div/0	186.7±0.10ns	186.2±0.08ns	-0.27%
decimal::from_string/0	151.8±0.20ns	153.4±0.14ns	+1.05%
decimal::mul/0	151.1±0.12ns	149.6±0.31ns	-0.99%
decimal::mul/rust-native	147.2±0.02ns	147.6±0.07ns	+0.27%
decimal::mul/wasmi	11.9±0.05µs	11.8±0.04µs	-0.84%
decimal::mul/wasmi-call-native	2.3±0.01µs	2.3±0.00µs	0.00%
decimal::pow/0	693.6±0.68ns	700.6±0.86ns	+1.01%
decimal::pow/rust-native	680.9±0.68ns	681.2±0.91ns	+0.04%
decimal::pow/wasmi	59.3±0.36µs	57.8±0.19µs	-2.53%
decimal::pow/wasmi-call-native	3.4±0.00µs	3.7±0.00µs	+8.82%
decimal::root/0	7.9±0.00µs	8.0±0.01µs	+1.27%
decimal::sub/0	8.6±0.45ns	8.3±0.28ns	-3.49%
decimal::to_string/0	448.2±0.44ns	445.1±0.19ns	-0.69%
large_transaction_processing::prepare	2.6±0.00ms	2.6±0.00ms	0.00%
large_transaction_processing::prepare_and_decompile	7.0±0.03ms	6.9±0.02ms	-1.43%
large_transaction_processing::prepare_and_decompile_and_recompile	28.6±1.39ms	32.6±0.31ms	+13.99%
precise_decimal::add/0	9.1±0.02ns	9.1±0.01ns	0.00%
precise_decimal::add/rust-native	10.7±0.03ns	10.7±0.03ns	0.00%
precise_decimal::add/wasmi	274.7±2.13ns	280.4±0.94ns	+2.07%
precise_decimal::add/wasmi-call-native	2.8±0.01µs	2.8±0.00µs	0.00%
precise_decimal::div/0	336.1±0.25ns	349.5±4.12ns	+3.99%
precise_decimal::from_string/0	207.2±0.38ns	207.6±0.56ns	+0.19%
precise_decimal::mul/0	365.4±0.49ns	365.5±0.39ns	+0.03%
precise_decimal::mul/rust-native	319.2±0.27ns	318.7±0.44ns	-0.16%
precise_decimal::mul/wasmi	34.0±0.16µs	34.8±0.48µs	+2.35%
precise_decimal::mul/wasmi-call-native	3.2±0.01µs	3.2±0.00µs	0.00%
precise_decimal::pow/0	1926.9±1.38ns	2.0±0.01µs	+3.79%
precise_decimal::pow/rust-native	1521.0±1.78ns	1527.1±3.01ns	+0.40%
precise_decimal::pow/wasmi	170.4±2.21µs	163.7±0.25µs	-3.93%
precise_decimal::pow/wasmi-call-native	5.7±0.02µs	5.7±0.01µs	0.00%
precise_decimal::root/0	58.1±0.03µs	58.3±0.02µs	+0.34%
precise_decimal::sub/0	9.2±0.03ns	9.2±0.05ns	0.00%
precise_decimal::to_string/0	698.0±0.77ns	699.2±1.38ns	+0.17%
schema::validate_payload	363.0±0.68µs	358.4±0.76µs	-1.27%
transaction::radiswap	5.0±0.02ms	4.6±0.03ms	-8.00%
transaction::transfer	1911.1±10.65µs	1735.3±12.95µs	-9.20%
transaction_validation::validate_manifest	43.2±0.18µs	43.1±0.07µs	-0.23%
transaction_validation::verify_bls_2KB	1003.6±12.94µs	1044.7±30.34µs	+4.10%
transaction_validation::verify_bls_32B	1003.0±10.03µs	1003.5±8.97µs	+0.05%
transaction_validation::verify_ecdsa	74.7±0.05µs	75.8±0.08µs	+1.47%
transaction_validation::verify_ed25519	42.0±0.07µs	42.2±0.08µs	+0.48%