Reduce Rust Wasm Module Size By 85% (wasm-snip)

[dOrgJelli]

closes: #896

After going through the rust documentation here:
https://rustwasm.github.io/book/reference/code-size.html

I instrumented the wasm modules, and found out that ~85% of the code was "dead" and unreachable (thank you twiggy). I then used another tool the guide recommended, wasm-snip, and boom our module size shrank tremendously!

name	old wasm-rs	wasm-rs	wasm-as
simple-storage	m=1.7mb; q=1.5mb;	m=282kb; q=136kb;	m=86kb; q=49kb;
object-types	1.5mb	135kb	53kb

The "dead code" in question was:

> ~/.../wasm-rs/simple-storage$ twiggy garbage ./build/mutation.wasm 
 Bytes   │ Size % │ Garbage Item
─────────┼────────┼──────────────────────────────────────────────────────────
  617852 ┊ 36.18% ┊ custom section '.debug_str'
  392794 ┊ 23.00% ┊ custom section '.debug_info'
  224924 ┊ 13.17% ┊ custom section '.debug_pubnames'
  161184 ┊  9.44% ┊ custom section '.debug_ranges'
   12627 ┊  0.74% ┊ custom section '.debug_line'
    5406 ┊  0.32% ┊ custom section '.debug_abbrev'
     540 ┊  0.03% ┊ custom section '.debug_pubtypes'
      75 ┊  0.00% ┊ custom section 'producers'
      14 ┊  0.00% ┊ import env::memory
      12 ┊  0.00% ┊ type[21]: (i32, i32, i32, i32, i32, i32, i32, i32) -> i32
 1415428 ┊ 82.88% ┊ Σ [10 Total Rows]
   33556 ┊  1.96% ┊ 1 potential false-positive data segments

[nerfZael]

Insane!