CI fix + update Rust version comments

[lrubasze]

• Warn (instead of return error) when no tests to run for nextest
  (nextest changed default behaviour since version 0.9.85)
• Update Rust version comments

[github-actions]

Docker tags
docker.io/radixdlt/private-scrypto-builder:a91787d8bc

[github-actions]

Benchmark for a29d100

Click to view benchmark

Test	Base	PR	%
costing::bench_prepare_wasm	44.3±0.08ms	44.4±0.08ms	+0.23%
costing::decode_encoded_i8_array_to_manifest_raw_value	19.3±0.02ms	19.3±0.03ms	0.00%
costing::decode_encoded_i8_array_to_manifest_value	40.8±0.05ms	42.4±0.09ms	+3.92%
costing::decode_encoded_tuple_array_to_manifest_raw_value	70.6±0.09ms	72.2±0.09ms	+2.27%
costing::decode_encoded_tuple_array_to_manifest_value	115.9±1.02ms	98.9±0.14ms	-14.67%
costing::decode_encoded_u8_array_to_manifest_raw_value	31.9±0.07µs	31.9±0.05µs	0.00%
costing::decode_encoded_u8_array_to_manifest_value	40.8±0.05ms	42.4±0.05ms	+3.92%
costing::decode_rpd_to_manifest_raw_value	14.6±0.02µs	15.0±0.03µs	+2.74%
costing::decode_rpd_to_manifest_value	11.0±0.02µs	11.2±0.01µs	+1.82%
costing::deserialize_wasm	1206.6±4.38µs	1222.1±7.56µs	+1.28%
costing::execute_transaction_creating_big_vec_substates	695.3±4.08ms	699.2±8.49ms	+0.56%
costing::execute_transaction_reading_big_vec_substates	572.8±1.55ms	592.2±0.84ms	+3.39%
costing::instantiate_flash_loan	865.7±385.74µs	988.7±968.29µs	+14.21%
costing::instantiate_radiswap	1043.0±1945.05µs	963.2±766.81µs	-7.65%
costing::scrypto_malloc	660.9±1.14ms	666.2±1.74ms	+0.80%
costing::scrypto_sbor_decode	648.6±0.67ms	651.3±1.35ms	+0.42%
costing::scrypto_sha256	586.7±0.83ms	581.5±0.94ms	-0.89%
costing::spin_loop_v1	516.7±1.49ms	516.7±1.58ms	0.00%
costing::spin_loop_v2	594.3±3.98ms	598.2±8.58ms	+0.66%
costing::validate_sbor_payload	29.6±0.05µs	29.7±0.11µs	+0.34%
costing::validate_sbor_payload_bytes	261.3±2.88ns	271.3±6.68ns	+3.83%
costing::validate_secp256k1	76.5±0.05µs	77.7±0.11µs	+1.57%
costing::validate_wasm	33.4±0.03ms	33.5±0.03ms	+0.30%
decimal::add/0	8.4±0.00ns	8.4±0.00ns	0.00%
decimal::add/rust-native	9.8±0.00ns	9.8±0.00ns	0.00%
decimal::add/wasmi	328.1±2.02ns	325.9±1.13ns	-0.67%
decimal::add/wasmi-call-native	2.9±0.00µs	2.9±0.00µs	0.00%
decimal::div/0	168.5±0.25ns	174.8±0.72ns	+3.74%
decimal::from_string/0	156.3±0.10ns	156.6±0.19ns	+0.19%
decimal::mul/0	127.6±0.11ns	129.6±0.06ns	+1.57%
decimal::mul/rust-native	128.1±0.08ns	128.2±0.26ns	+0.08%
decimal::mul/wasmi	19.7±0.03µs	19.6±0.03µs	-0.51%
decimal::mul/wasmi-call-native	3.0±0.00µs	3.1±0.01µs	+3.33%
decimal::pow/0	592.0±0.39ns	591.9±0.31ns	-0.02%
decimal::pow/rust-native	590.0±0.33ns	589.9±0.16ns	-0.02%
decimal::pow/wasmi	92.7±0.12µs	93.9±0.19µs	+1.29%
decimal::pow/wasmi-call-native	4.8±0.01µs	4.8±0.01µs	0.00%
decimal::root/0	8.3±0.01µs	8.1±0.01µs	-2.41%
decimal::sub/0	8.2±0.09ns	8.4±0.02ns	+2.44%
decimal::to_string/0	445.6±0.28ns	442.0±0.58ns	-0.81%
large_transaction_processing::prepare	2.5±0.00ms	2.6±0.00ms	+4.00%
large_transaction_processing::prepare_and_decompile	6.2±0.02ms	6.1±0.02ms	-1.61%
large_transaction_processing::prepare_and_decompile_and_recompile	29.8±2.16ms	25.8±1.50ms	-13.42%
metadata_validation::validate_urls	4.8±0.02µs	4.9±0.10µs	+2.08%
precise_decimal::add/0	8.9±0.01ns	8.7±0.01ns	-2.25%
precise_decimal::add/rust-native	10.7±0.05ns	10.7±0.15ns	0.00%
precise_decimal::add/wasmi	426.8±1.90ns	424.3±3.05ns	-0.59%
precise_decimal::add/wasmi-call-native	3.8±0.01µs	3.8±0.01µs	0.00%
precise_decimal::div/0	286.8±0.33ns	286.9±0.35ns	+0.03%
precise_decimal::from_string/0	201.7±0.17ns	203.8±0.92ns	+1.04%
precise_decimal::mul/0	329.5±0.30ns	328.7±0.45ns	-0.24%
precise_decimal::mul/rust-native	286.4±0.24ns	285.9±0.35ns	-0.17%
precise_decimal::mul/wasmi	48.5±0.28µs	48.0±0.15µs	-1.03%
precise_decimal::mul/wasmi-call-native	4.1±0.01µs	4.2±0.01µs	+2.44%
precise_decimal::pow/0	1730.1±4.77ns	1733.1±2.28ns	+0.17%
precise_decimal::pow/rust-native	1353.5±1.28ns	1353.9±0.75ns	+0.03%
precise_decimal::pow/wasmi	230.8±0.48µs	231.9±0.46µs	+0.48%
precise_decimal::pow/wasmi-call-native	7.5±0.02µs	7.4±0.01µs	-1.33%
precise_decimal::root/0	57.8±0.01µs	57.7±0.04µs	-0.17%
precise_decimal::sub/0	9.2±0.05ns	9.0±0.06ns	-2.17%
precise_decimal::to_string/0	696.1±1.34ns	728.5±3.42ns	+4.65%
schema::validate_payload	386.6±0.49µs	387.2±0.57µs	+0.16%
transaction::radiswap	4.9±0.03ms	4.9±0.02ms	0.00%
transaction::transfer	1784.1±2.78µs	1806.4±4.65µs	+1.25%
transaction_validation::validate_manifest	43.0±0.03µs	43.1±0.14µs	+0.23%
transaction_validation::verify_bls_2KB	965.6±10.44µs	950.8±5.40µs	-1.53%
transaction_validation::verify_bls_32B	976.3±8.99µs	950.2±3.73µs	-2.67%
transaction_validation::verify_ecdsa	74.4±0.05µs	74.4±0.07µs	0.00%
transaction_validation::verify_ed25519	42.2±0.07µs	42.2±0.08µs	0.00%