deps: updates wazero to 1.2.1

[codefromthecrypt]

This updates wazero to 1.2.1 which improves performance and support for non-blocking I/O.

goos: darwin
goarch: arm64
pkg: mosn.io/proxy-wasm-go-host/internal/e2e
                             │ v1.0.0-rc.2.txt │             v1.2.1.txt              │
                             │     sec/op      │    sec/op     vs base               │
StartABIContextV1_wazero-12       3.118m ±  8%   1.242m ±  4%  -60.15% (p=0.002 n=6)
AddRequestHeaderV1_wazero-12      3.751µ ±  3%   3.468µ ± 33%        ~ (p=0.065 n=6)
StartABIContextV2_wazero-12       3.345m ±  3%   1.375m ±  3%  -58.90% (p=0.002 n=6)
AddRequestHeaderV2_wazero-12      3.823µ ±  5%   5.038µ ± 26%  +31.79% (p=0.002 n=6)

[codefromthecrypt]

note there is a lot of variance in the AddRequestHeaderXXX benchmark because the internal architecture of this plugin is not optimized.

An optimal plugin will re-use a module's function instances instead of re-creating them per request. This can get the performance more consistent. On the other hand, performance is limited anyway due to heavy use of reflection.