fix(runtime-core): incorrect callback parameters when reactive array ref passes to watch

[Dunqing]

close: #9416

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	85.9 kB (+27 B)	32.7 kB (+28 B)	29.5 kB (+17 B)
vue.global.prod.js	132 kB (+27 B)	49.4 kB (+22 B)	44.3 kB (-43 B)

Usages

Name	Size	Gzip	Brotli
createApp	47.9 kB (+27 B)	18.9 kB (+17 B)	17.2 kB (+64 B)
createSSRApp	50.7 kB (+27 B)	20 kB (+17 B)	18.2 kB (+18 B)
defineCustomElement	50.3 kB (+27 B)	19.7 kB (+14 B)	17.9 kB (+20 B)
overall	61.3 kB (+27 B)	23.7 kB (+23 B)	21.6 kB (+21 B)

[skirtles-code]

I don't think these changes can be merged. Changing the runtime behaviour for watching a reactive array will break too many real applications.

I found it interesting that the changes proposed here didn't trigger any test failures. I opened #10848 (now merged) to try to address that. Several of those tests would fail if the changes proposed here were merged.

I don't have any suggestions for how to fix the original issue. The types are inconsistent with the runtime values, but we can't change the runtime values. I'm not sure whether fixing it in the types is possible.

[yyx990803]

Closing as #9416 is indeed a type issue.