fix(runtime-core): sync watch should be executed correctly

[yangxiuxiu1115]

fix #11577

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	98.7 kB (-15 B)	37.4 kB (-13 B)	33.7 kB (-12 B)
vue.global.prod.js	156 kB (-15 B)	57.2 kB (-10 B)	50.9 kB (+59 B)

Usages

Name	Size	Gzip	Brotli
createApp	54.2 kB (-15 B)	21 kB (-11 B)	19.1 kB (-9 B)
createSSRApp	58.2 kB (-15 B)	22.6 kB (-11 B)	20.6 kB (-47 B)
defineCustomElement	58.8 kB (-15 B)	22.5 kB (-10 B)	20.5 kB (+44 B)
overall	67.8 kB (-15 B)	26 kB (-11 B)	23.7 kB (+60 B)

[yyx990803]

Thanks, merging #11589 which was submitted first