Implement Module::get_export method

[Robbepop]

This API was still missing since it is available in the Wasmtime API.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ bare_call_0	1.40ms	1.41ms	⚪ 0.41%	1.11ms	1.12ms	🔴 0.22%	🟢 -20%
execute/ bare_call_0/typed	1.01ms	1.01ms	⚪ 0.31%	724.83µs	734.39µs	🔴 1.42%	🟢 -27%
execute/ bare_call_1	1.44ms	1.45ms	🔴 0.25%	1.49ms	1.42ms	🔴 -4.32%	🟢 -2%
execute/ bare_call_16	2.39ms	2.47ms	🔴 3.23%	4.14ms	4.20ms	🔴 1.32%	🟡 70%
execute/ bare_call_16/typed	1.54ms	1.59ms	🔴 2.82%	2.39ms	2.48ms	🔴 4.07%	🟡 56%
execute/ bare_call_1/typed	1.09ms	1.11ms	🔴 1.88%	1.07ms	1.10ms	🔴 2.71%	🟢 -1%
execute/ bare_call_4	1.60ms	1.62ms	⚪ 1.07%	2.01ms	1.99ms	🔴 -1.29%	🟢 23%
execute/ bare_call_4/typed	1.11ms	1.12ms	⚪ 0.33%	1.13ms	1.17ms	🔴 3.06%	🟢 4%
execute/ br_table	1.11ms	1.18ms	🔴 4.57%	1.25ms	1.27ms	🔴 1.50%	🟢 8%
execute/ count_until	651.99µs	682.03µs	🔴 4.67%	2.12ms	2.12ms	⚪ -0.21%	🔴 211%
execute/ factorial_iterative	325.47µs	330.28µs	⚪ 1.31%	884.12µs	879.30µs	⚪ -0.45%	🔴 166%
execute/ factorial_recursive	652.54µs	656.38µs	⚪ 0.60%	1.39ms	1.39ms	⚪ 0.31%	🔴 112%
execute/ fib_iterative	1.45ms	1.47ms	⚪ 0.89%	4.64ms	4.64ms	⚪ -0.02%	🔴 216%
execute/ fib_recursive	5.67ms	5.77ms	🔴 1.86%	12.43ms	12.39ms	⚪ -0.20%	🔴 115%
execute/ global_bump	976.06µs	1.01ms	🔴 3.58%	3.28ms	3.30ms	⚪ 0.59%	🔴 226%
execute/ global_const	742.65µs	719.11µs	🟢 -3.27%	2.40ms	2.40ms	⚪ -0.04%	🔴 233%
execute/ host_calls	28.95µs	29.20µs	⚪ 1.02%	41.23µs	41.27µs	⚪ -0.10%	🟢 41%
execute/ memory_fill	1.25ms	1.31ms	🔴 4.96%	3.87ms	3.88ms	⚪ 0.07%	🔴 196%
execute/ memory_sum	1.22ms	1.22ms	⚪ -0.31%	3.89ms	3.89ms	⚪ 0.22%	🔴 219%
execute/ memory_vec_add	2.54ms	2.53ms	⚪ -0.18%	7.99ms	7.99ms	⚪ 0.04%	🔴 215%
execute/ recursive_is_even	1.16ms	1.18ms	🔴 1.97%	2.24ms	2.26ms	⚪ 0.87%	🟡 91%
execute/ recursive_ok	159.29µs	153.11µs	🟢 -3.89%	318.69µs	323.49µs	🔴 1.57%	🔴 111%
execute/ recursive_scan	190.77µs	177.85µs	🟢 -6.79%	415.54µs	416.94µs	⚪ 0.25%	🔴 134%
execute/ recursive_trap	14.56µs	14.40µs	🟢 -1.23%	32.83µs	33.11µs	⚪ 0.97%	🔴 130%
execute/ regex_redux	538.13µs	547.47µs	🔴 1.89%	1.52ms	1.49ms	🟢 -1.86%	🔴 173%
execute/ rev_complement	493.77µs	479.24µs	🟢 -3.04%	1.44ms	1.45ms	⚪ 0.25%	🔴 202%
execute/ tiny_keccak	360.06µs	369.34µs	🔴 2.20%	1.18ms	1.20ms	🔴 1.83%	🔴 225%
execute/ trunc_f2i	906.46µs	907.60µs	⚪ 0.00%	2.46ms	2.46ms	⚪ -0.04%	🔴 171%
instantiate/ wasm_kernel	66.36µs	61.48µs	🟢 -8.36%	86.66µs	87.35µs	⚪ 0.02%	🟢 42%
translate/ erc1155	209.91µs	207.64µs	🟢 -1.39%	403.77µs	420.32µs	🔴 4.03%	🔴 102%
translate/ erc20	102.16µs	100.95µs	⚪ -1.10%	197.85µs	206.53µs	🔴 4.53%	🔴 105%
translate/ erc721	148.21µs	144.32µs	🟢 -2.44%	288.12µs	301.09µs	🔴 4.63%	🔴 109%
translate/ spidermonkey	0.00ns	0.00ns	⚪ -0.08%	0.00ns	0.00ns	🔴 3.46%	🟢 0%
translate/ wasm_kernel	3.78ms	3.80ms	⚪ 0.58%	7.70ms	7.94ms	🔴 3.18%	🔴 109%

Link to pipeline