fix(compiler-vapor): v-on for component support $event argument

[Jevon617]

Currently, in <Foo @bar="handleBar($event)"> this case, compiler will prefix $event with _ctx wrongly.

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[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
compiler-dom.global.prod.js	80 kB	28.1 kB	24.7 kB
compiler-vapor.global.prod.js	49.5 kB (+3 B)	16.9 kB (+15 B)	15.3 kB (+12 B)
runtime-dom.global.prod.js	94.5 kB	35.6 kB	32 kB
runtime-vapor.global.prod.js	42.8 kB	15.9 kB	14.6 kB
vue-vapor.global.prod.js	89.8 kB (+3 B)	31.3 kB (+12 B)	28.4 kB (+24 B)
vue.global.prod.js	152 kB	54.9 kB	49 kB

Usages

Name	Size	Gzip	Brotli
createApp	54.8 kB	21 kB	19.2 kB
createSSRApp	58.1 kB	22.3 kB	20.4 kB
defineCustomElement	57.1 kB	21.8 kB	19.9 kB
vapor	43 kB	15.9 kB	14.6 kB
overall	68.5 kB	26.1 kB	23.6 kB

[sxzz]

LGTM, great!