Compare benchmarks between rustc stable and nightly channels

[Robbepop]

I got suspicious after I saw huge regressions in the ballpark of 30-80% on my local development platform so I just wanted to make sure that it is not my local environment by running those same benchmarks on the CI runners.

edit: Those regressions are very real ...

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ count_until	888.50µs	1.24ms	🔴 40.06%	2.38ms	3.10ms	🔴 30.07%	🔴 149%
execute/ factorial_iterative	400.45ns	542.71ns	🔴 35.46%	993.53ns	1.30µs	🔴 30.67%	🔴 139%
execute/ factorial_recursive	761.07ns	840.76ns	🔴 10.47%	1.56µs	1.71µs	🔴 9.65%	🔴 103%
execute/ fib_iterative	1.94ms	2.55ms	🔴 36.62%	5.12ms	6.72ms	🔴 31.43%	🔴 163%
execute/ fib_recursive	6.88ms	8.46ms	🔴 23.79%	14.30ms	15.56ms	🔴 9.01%	🟡 84%
execute/ global_bump	1.43ms	1.83ms	🔴 27.29%	3.63ms	4.53ms	🔴 24.79%	🔴 148%
execute/ host_calls	31.80µs	32.44µs	⚪ 2.03%	45.05µs	48.33µs	🔴 7.37%	🟢 49%
execute/ memory_fill	1.54ms	2.32ms	🔴 50.88%	4.33ms	5.81ms	🔴 34.03%	🔴 151%
execute/ memory_sum	1.52ms	2.34ms	🔴 53.50%	4.37ms	5.84ms	🔴 33.68%	🔴 150%
execute/ memory_vec_add	3.03ms	4.81ms	🔴 60.16%	8.97ms	12.11ms	🔴 35.19%	🔴 152%
execute/ recursive_is_even	1.30ms	1.35ms	🔴 3.91%	2.60ms	2.69ms	🔴 3.15%	🟡 99%
execute/ recursive_ok	173.10µs	181.42µs	🔴 5.00%	350.49µs	380.08µs	🔴 8.82%	🔴 109%
execute/ recursive_scan	213.44µs	235.58µs	🔴 10.47%	468.96µs	505.36µs	🔴 7.65%	🔴 115%
execute/ recursive_trap	17.29µs	17.99µs	🔴 4.15%	35.50µs	39.14µs	🔴 10.18%	🔴 118%
execute/ regex_redux	665.58µs	871.56µs	🔴 30.94%	1.60ms	2.08ms	🔴 29.51%	🔴 138%
execute/ rev_complement	596.99µs	876.68µs	🔴 46.98%	1.55ms	2.11ms	🔴 35.85%	🔴 140%
execute/ tiny_keccak	473.22µs	833.78µs	🔴 77.02%	1.42ms	1.80ms	🔴 26.52%	🔴 116%
execute/ trunc_f2i	1.07ms	1.31ms	🔴 22.19%	2.73ms	3.49ms	🔴 27.80%	🔴 167%
instantiate/ wasm_kernel	70.04µs	71.45µs	⚪ 2.09%	128.03µs	92.10µs	🟢 -27.74%	🟢 29%
translate/ wasm_kernel	4.88ms	4.72ms	🟢 -3.24%	9.47ms	9.88ms	🔴 3.72%	🔴 109%

Link to pipeline

[Robbepop]

Closing this since the demonstration for rust-lang/rust#102952 has been shown.