Use references where possible in Store and StoreInner

[Robbepop]

The idea behind this change is that the Rust compiler (and LLVM) have a greater chance to apply optimizations if parameters are at most pointer sized. Unfortunately wasmi reference types such as Func, Global etc. do eventually not fit into a pointer and therefore might regress performance.

Furthermore this is more aligned with what the Wasmtime API does in such cases.
As an additional bonus this allows us to more room for experimentation with the internals of those wasmi reference types such as Func, Global etc. since wasmi methods are less dependent on the actual structure of those types with these changes.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ bare_call_0	1.40ms	1.52ms	🔴 8.52%	1.10ms	1.11ms	⚪ 1.32%	🟢 -27%
execute/ bare_call_0/typed	1.01ms	1.01ms	⚪ -0.61%	738.82µs	744.08µs	⚪ 0.62%	🟢 -26%
execute/ bare_call_1	1.44ms	1.47ms	🔴 2.39%	1.30ms	1.22ms	🟢 -6.17%	🟢 -17%
execute/ bare_call_16	2.42ms	2.40ms	⚪ -0.44%	4.21ms	4.20ms	🟢 -0.05%	🟡 75%
execute/ bare_call_16/typed	1.58ms	1.59ms	⚪ 0.74%	2.71ms	2.62ms	🟢 -3.37%	🟡 65%
execute/ bare_call_1/typed	1.10ms	1.10ms	⚪ -0.55%	1.09ms	1.06ms	🟢 -2.31%	🟢 -3%
execute/ bare_call_4	1.60ms	1.52ms	🔴 -5.09%	1.88ms	1.77ms	🔴 -5.96%	🟢 16%
execute/ bare_call_4/typed	1.11ms	1.14ms	🔴 2.66%	1.16ms	1.18ms	🔴 1.88%	🟢 4%
execute/ br_table	1.11ms	1.11ms	⚪ 0.45%	1.38ms	1.37ms	⚪ -0.34%	🟢 23%
execute/ count_until	711.33µs	651.62µs	🟢 -8.52%	2.78ms	2.37ms	🟢 -14.31%	🔴 263%
execute/ factorial_iterative	325.27µs	319.09µs	🟢 -1.74%	1.16ms	963.04µs	🟢 -17.00%	🔴 202%
execute/ factorial_recursive	645.56µs	629.57µs	🟢 -2.51%	1.64ms	1.25ms	🟢 -23.47%	🟡 98%
execute/ fib_iterative	1.43ms	1.41ms	🟢 -1.52%	6.01ms	5.53ms	🟢 -7.96%	🔴 292%
execute/ fib_recursive	5.68ms	5.67ms	⚪ -0.15%	14.61ms	10.76ms	🟢 -26.29%	🟡 90%
execute/ global_bump	1.02ms	952.91µs	🟢 -5.60%	3.79ms	2.63ms	🟢 -30.83%	🔴 176%
execute/ global_const	717.33µs	769.24µs	🔴 7.22%	3.26ms	2.80ms	🟢 -14.39%	🔴 264%
execute/ host_calls	28.85µs	26.09µs	🟢 -7.34%	43.21µs	36.14µs	🟢 -15.98%	🟢 39%
execute/ memory_fill	1.30ms	1.23ms	🟢 -5.76%	4.95ms	4.39ms	🟢 -11.35%	🔴 258%
execute/ memory_sum	1.25ms	1.17ms	🟢 -5.90%	4.97ms	4.39ms	🟢 -11.65%	🔴 274%
execute/ memory_vec_add	2.58ms	2.43ms	🟢 -5.76%	10.16ms	8.28ms	🟢 -18.36%	🔴 241%
execute/ recursive_is_even	1.16ms	1.14ms	⚪ -1.71%	2.91ms	2.31ms	🟢 -20.38%	🔴 103%
execute/ recursive_ok	148.65µs	146.67µs	⚪ -1.65%	383.49µs	323.16µs	🟢 -15.50%	🔴 120%
execute/ recursive_scan	179.85µs	180.68µs	⚪ 0.37%	488.80µs	387.54µs	🟢 -21.09%	🔴 114%
execute/ recursive_trap	14.41µs	13.86µs	🟢 -3.81%	39.82µs	29.05µs	🟢 -27.49%	🔴 110%
execute/ regex_redux	542.25µs	523.67µs	🟢 -3.46%	1.74ms	1.42ms	🟢 -18.30%	🔴 171%
execute/ rev_complement	501.75µs	478.43µs	🟢 -4.46%	1.69ms	1.47ms	🟢 -13.24%	🔴 207%
execute/ tiny_keccak	371.09µs	334.62µs	🟢 -9.76%	1.47ms	1.23ms	🟢 -16.25%	🔴 269%
execute/ trunc_f2i	909.20µs	696.49µs	🟢 -23.41%	2.85ms	2.14ms	🟢 -24.94%	🔴 207%
instantiate/ wasm_kernel	63.75µs	62.15µs	⚪ -2.27%	78.70µs	82.02µs	🔴 4.87%	🟢 32%
translate/ erc1155	207.41µs	206.65µs	⚪ -0.71%	392.11µs	375.90µs	🟢 -3.62%	🟡 82%
translate/ erc20	101.79µs	100.88µs	⚪ -1.23%	189.88µs	185.90µs	🟢 -2.64%	🟡 84%
translate/ erc721	146.11µs	145.27µs	⚪ -0.63%	276.42µs	276.26µs	⚪ 0.98%	🟡 90%
translate/ spidermonkey	0.00ns	0.00ns	⚪ 0.35%	0.00ns	0.00ns	🟢 -3.95%	🟢 0%
translate/ wasm_kernel	3.77ms	3.82ms	⚪ 0.18%	7.28ms	7.09ms	🟢 -2.59%	🟡 86%

Link to pipeline