Add br_i{32,64}[_not]_eq_{s,r}z ops

[Robbepop]

Assembly: branch_i32_eq_rz

wasmi::engine::executor::handler::exec::branch_i32_eq_rz:
Lfunc_begin1308:
        .cfi_startproc
        ldrsw x8, [x1, #8]
        add x9, x1, #16
        add x8, x1, x8
        cmp w6, #0
        csel x1, x8, x9, eq
        ldr x7, [x1]
        br x7

Assembly: branch_i32_eq_ri

wasmi::engine::executor::handler::exec::branch_i32_eq_ri:
Lfunc_begin1306:
        .cfi_startproc
        ldp w8, w9, [x1, #8]
        sxtw x8, w8
        add x10, x1, #16
        add x8, x1, x8
        cmp w9, w6
        csel x1, x8, x10, eq
        ldr x7, [x1]
        br x7

[codecov]

Codecov Report

❌ Patch coverage is 82.35294% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.28%. Comparing base (c242c15) to head (a5db502).

Files with missing lines	Patch %	Lines
crates/wasmi/src/engine/translator/comparator.rs	76.92%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2026      +/-   ##
==========================================
- Coverage   76.29%   76.28%   -0.01%     
==========================================
  Files         168      168              
  Lines       15531    15559      +28     
==========================================
+ Hits        11849    11869      +20     
- Misses       3682     3690       +8     

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