Improve Wasmtime-like API for wasmi further

[Robbepop]

Follow-up for #615.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ bare_call_0	1.41ms	1.42ms	⚪ 0.38%	1.22ms	1.13ms	🟢 -7.03%	🟢 -20%
execute/ bare_call_0/typed	1.01ms	1.02ms	⚪ 0.99%	724.97µs	729.89µs	⚪ 0.76%	🟢 -28%
execute/ bare_call_1	1.45ms	1.45ms	🟢 0.32%	1.45ms	1.45ms	🟢 -0.64%	🟢 -0%
execute/ bare_call_16	2.54ms	2.40ms	🟢 -5.23%	4.10ms	4.12ms	⚪ 0.51%	🟡 72%
execute/ bare_call_16/typed	1.59ms	1.58ms	⚪ -0.88%	2.30ms	2.30ms	⚪ -0.16%	🟢 45%
execute/ bare_call_1/typed	1.10ms	1.10ms	⚪ 0.51%	1.08ms	1.06ms	🟢 -1.81%	🟢 -4%
execute/ bare_call_4	1.64ms	1.69ms	🔴 2.43%	1.94ms	1.95ms	⚪ 0.86%	🟢 16%
execute/ bare_call_4/typed	1.12ms	1.12ms	⚪ 0.30%	1.11ms	1.10ms	⚪ -0.23%	🟢 -2%
execute/ br_table	1.10ms	1.15ms	🔴 4.10%	1.28ms	1.31ms	🔴 2.61%	🟢 14%
execute/ count_until	716.43µs	651.20µs	🟢 -9.39%	2.24ms	2.25ms	⚪ 0.71%	🔴 245%
execute/ factorial_iterative	325.33µs	335.08µs	🔴 2.89%	908.99µs	901.17µs	⚪ -0.65%	🔴 169%
execute/ factorial_recursive	644.34µs	645.59µs	⚪ 0.18%	1.36ms	1.36ms	⚪ 0.15%	🔴 111%
execute/ fib_iterative	1.43ms	1.45ms	🔴 1.45%	4.68ms	4.69ms	⚪ 0.28%	🔴 223%
execute/ fib_recursive	5.74ms	5.85ms	🔴 2.02%	12.22ms	12.32ms	⚪ 0.74%	🔴 111%
execute/ global_bump	1.02ms	1.05ms	🔴 3.06%	3.32ms	3.35ms	⚪ 1.01%	🔴 220%
execute/ global_const	719.75µs	743.81µs	🔴 3.30%	2.58ms	2.59ms	⚪ 0.35%	🔴 249%
execute/ host_calls	29.21µs	28.94µs	⚪ -1.00%	42.39µs	41.13µs	🟢 -2.99%	🟢 42%
execute/ memory_fill	1.30ms	1.25ms	🟢 -4.13%	3.98ms	3.98ms	⚪ 0.16%	🔴 219%
execute/ memory_sum	1.30ms	1.22ms	🟢 -5.77%	3.94ms	3.93ms	⚪ -0.16%	🔴 222%
execute/ memory_vec_add	2.55ms	2.54ms	⚪ -0.51%	8.18ms	8.15ms	⚪ -0.24%	🔴 221%
execute/ recursive_is_even	1.14ms	1.19ms	🔴 3.77%	2.22ms	2.22ms	⚪ 0.05%	🟡 86%
execute/ recursive_ok	147.96µs	147.18µs	⚪ -0.54%	312.81µs	310.29µs	⚪ -0.81%	🔴 111%
execute/ recursive_scan	179.98µs	178.23µs	⚪ -1.08%	405.08µs	404.07µs	⚪ -0.09%	🔴 127%
execute/ recursive_trap	14.46µs	14.37µs	⚪ -0.52%	31.51µs	31.72µs	⚪ 0.61%	🔴 121%
execute/ regex_redux	544.74µs	533.46µs	🟢 -2.07%	1.49ms	1.47ms	🟢 -1.26%	🔴 176%
execute/ rev_complement	488.72µs	489.41µs	⚪ 0.24%	1.43ms	1.42ms	⚪ -0.78%	🔴 189%
execute/ tiny_keccak	360.86µs	360.38µs	⚪ 0.00%	1.17ms	1.17ms	⚪ -0.45%	🔴 224%
execute/ trunc_f2i	906.38µs	906.53µs	⚪ 0.02%	2.51ms	2.50ms	⚪ -0.08%	🔴 176%
instantiate/ wasm_kernel	64.77µs	64.70µs	🟢 -4.19%	106.42µs	83.09µs	🟢 -21.51%	🟢 28%
translate/ erc1155	209.81µs	211.62µs	⚪ 0.77%	403.94µs	409.20µs	⚪ 1.28%	🟡 93%
translate/ erc20	101.87µs	105.18µs	🔴 3.15%	196.88µs	201.09µs	🔴 2.31%	🟡 91%
translate/ erc721	147.63µs	150.29µs	🔴 1.83%	287.47µs	290.82µs	⚪ 1.16%	🟡 94%
translate/ spidermonkey	0.00ns	0.00ns	⚪ -1.14%	0.00ns	0.00ns	⚪ 0.11%	🟢 0%
translate/ wasm_kernel	3.85ms	3.88ms	⚪ 0.70%	7.64ms	7.65ms	⚪ -0.03%	🟡 97%

Link to pipeline

[codecov-commenter]

Codecov Report

Merging #616 (a09e8a5) into master (b9168b0) will increase coverage by 0.10%.
The diff coverage is 73.27%.

@@            Coverage Diff             @@
##           master     #616      +/-   ##
==========================================
+ Coverage   80.44%   80.55%   +0.10%     
==========================================
  Files          83       83              
  Lines        6920     6907      -13     
==========================================
- Hits         5567     5564       -3     
+ Misses       1353     1343      -10     

Impacted Files	Coverage Δ
crates/cli/src/main.rs	0.00% <0.00%> (ø)
crates/wasmi/src/engine/executor.rs	97.83% <0.00%> (-0.16%)	⬇️
crates/wasmi/src/external.rs	59.25% <0.00%> (ø)
crates/wasmi/src/module/instantiate/error.rs	0.00% <ø> (ø)
crates/wasmi/src/global.rs	48.00% <60.00%> (+3.55%)	⬆️
crates/wasmi/src/table.rs	50.49% <60.86%> (-0.49%)	⬇️
crates/wasmi/src/module/instantiate/mod.rs	79.59% <90.90%> (+1.21%)	⬆️
crates/core/src/value.rs	62.31% <100.00%> (ø)
crates/wasmi/src/engine/func_builder/mod.rs	89.93% <100.00%> (ø)
crates/wasmi/src/engine/mod.rs	81.44% <100.00%> (ø)
... and 13 more

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