Introduce WasmTranslator trait

[Robbepop]

This is later going to be used to implement #817 and others.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ br_table	1.51ms	1.49ms	⚪ -1.25%	1.26ms	1.28ms	🔴 1.67%	🟢 -14%
execute/ call/host/1	46.72µs	44.85µs	🟢 -3.52%	65.39µs	64.22µs	🟢 -1.81%	🟢 43%
execute/ call/rec	168.33µs	165.81µs	⚪ -1.27%	357.42µs	357.19µs	⚪ -0.06%	🔴 115%
execute/ count_until	6.66ms	7.47ms	🔴 12.43%	7.49ms	7.51ms	⚪ 0.28%	🟢 1%
execute/ divrem	6.22ms	6.27ms	⚪ 0.81%	6.96ms	6.97ms	⚪ 0.02%	🟢 11%
execute/ factorial/iter	232.22µs	255.11µs	🔴 10.05%	314.77µs	315.84µs	⚪ 0.16%	🟢 24%
execute/ factorial/rec	683.35µs	696.37µs	🔴 2.02%	1.28ms	1.26ms	🟢 -2.03%	🟡 80%
execute/ fibonacci/iter	1.29ms	1.27ms	⚪ -1.41%	1.27ms	1.26ms	⚪ -0.33%	🟢 -0%
execute/ fibonacci/rec	6.07ms	6.05ms	⚪ -0.37%	12.93ms	13.11ms	🔴 1.41%	🔴 117%
execute/ fibonacci/tail	1.50ms	1.57ms	🔴 4.74%	3.55ms	3.92ms	🔴 10.42%	🔴 150%
execute/ fuse	7.35ms	7.88ms	🔴 7.19%	11.59ms	11.41ms	🟢 -1.56%	🟢 45%
execute/ global/bump	1.32ms	1.32ms	⚪ 0.32%	1.54ms	1.54ms	⚪ 0.04%	🟢 16%
execute/ global/get_const	712.76µs	732.93µs	🔴 3.18%	750.82µs	750.17µs	⚪ -0.11%	🟢 2%
execute/ is_even/rec	1.07ms	1.08ms	⚪ 0.70%	2.29ms	2.26ms	⚪ -1.38%	🔴 109%
execute/ memory/fill_bytes	1.08ms	1.09ms	⚪ 1.11%	1.31ms	1.32ms	⚪ 0.35%	🟢 21%
execute/ memory/sum_bytes	1.10ms	1.04ms	🟢 -5.06%	1.23ms	1.25ms	🔴 1.83%	🟢 20%
execute/ memory/vec_add	2.97ms	2.95ms	⚪ -1.07%	3.61ms	3.63ms	⚪ 0.32%	🟢 23%
execute/ recursive_scan	187.30µs	186.45µs	⚪ -0.54%	389.70µs	387.26µs	⚪ -0.59%	🔴 108%
execute/ recursive_trap	15.36µs	15.29µs	⚪ -0.59%	35.54µs	35.10µs	⚪ -1.17%	🔴 130%
execute/ regex_redux	589.60µs	593.58µs	⚪ 0.73%	1.05ms	1.06ms	⚪ 0.42%	🟡 78%
execute/ rev_complement	444.69µs	444.30µs	⚪ 0.01%	642.51µs	638.19µs	⚪ -0.57%	🟢 44%
execute/ tiny_keccak	357.54µs	370.52µs	⚪ 0.56%	380.54µs	378.68µs	⚪ -0.52%	🟢 2%
execute/ trunc_f2i	615.88µs	615.02µs	⚪ -0.28%	952.51µs	961.35µs	⚪ 0.92%	🟡 56%
instantiate/ wasm_kernel	54.77µs	55.00µs	⚪ 1.24%	54.48µs	57.44µs	🔴 4.69%	🟢 4%
overhead/ call/typed/0	1.19ms	1.21ms	⚪ 2.15%	783.83µs	756.89µs	🟢 -3.42%	🟢 -37%
overhead/ call/typed/16	1.59ms	1.60ms	⚪ 0.33%	1.96ms	1.89ms	🟢 -3.65%	🟢 18%
overhead/ call/untyped/0	1.62ms	1.60ms	⚪ -1.21%	1.22ms	1.22ms	⚪ 0.41%	🟢 -24%
overhead/ call/untyped/16	2.46ms	2.66ms	🔴 7.75%	3.91ms	3.83ms	🟢 -2.08%	🟢 44%
translate/ bz2/default	1.38ms	1.39ms	⚪ 1.09%	2.56ms	2.49ms	🟢 -2.91%	🟡 78%
translate/ bz2/fuel	1.42ms	1.44ms	⚪ 1.41%	2.70ms	2.64ms	🟢 -2.16%	🟡 83%
translate/ erc1155/default	280.27µs	282.90µs	⚪ 0.85%	492.52µs	483.67µs	⚪ -1.58%	🟡 71%
translate/ erc1155/fuel	301.68µs	303.25µs	⚪ 0.35%	518.18µs	514.59µs	⚪ -0.67%	🟡 70%
translate/ erc20/default	135.25µs	136.84µs	⚪ 1.08%	232.14µs	231.26µs	⚪ -0.46%	🟡 69%
translate/ erc20/fuel	143.87µs	144.31µs	⚪ 0.31%	242.60µs	242.15µs	⚪ -0.26%	🟡 68%
translate/ erc721/default	191.69µs	194.38µs	⚪ 1.21%	336.78µs	334.13µs	⚪ -0.86%	🟡 72%
translate/ erc721/fuel	202.65µs	203.37µs	⚪ 0.49%	350.72µs	352.93µs	⚪ 0.48%	🟡 74%
translate/ pulldown_cmark/default	3.72ms	3.79ms	🔴 2.13%	6.65ms	6.51ms	🟢 -2.19%	🟡 72%
translate/ pulldown_cmark/fuel	3.82ms	3.89ms	🔴 2.34%	6.93ms	6.84ms	🟢 -1.28%	🟡 76%
translate/ spidermonkey/default	0.00ns	0.00ns	⚪ 0.56%	0.00ns	0.00ns	🟢 -2.82%	🟢 0%
translate/ spidermonkey/fuel	0.00ns	0.00ns	🔴 1.41%	0.00ns	0.00ns	🟢 -1.91%	🟢 0%
translate/ wasm_kernel/default	4.98ms	4.99ms	⚪ 0.20%	8.92ms	8.75ms	🟢 -2.04%	🟡 75%
translate/ wasm_kernel/fuel	5.13ms	5.15ms	⚪ 0.36%	9.28ms	9.18ms	⚪ -1.07%	🟡 78%

Link to pipeline