fix(runtime-core): fix missed updates when passing text vnode to <component :is>

[auvred]

fix #8298

The issue occurs when cloned initially had patchFlag === PatchFlags.TEXT, so

1 << 1 | -2 = -2
1 << 2 | -2 = -2
1 << 3 | -2 = -2
etc...

But with PatchFlags.TEXT = 1

1 | -2 = -1

And patchFlag becomes -1 and then patchFlag is basically PatchFlags.HOISTED, so it loses render patches

core/packages/shared/src/patchFlags.ts

Lines 104 to 107 in a374d7e

	* Special flags are negative integers. They are never matched against using
	* bitwise operators (bitwise matching should only happen in branches where
	* patchFlag > 0), and are mutually exclusive. When checking for a special
	* flag, simply check patchFlag === FLAG.

[skirtles-code]

Would it be possible to add a test?

[pikax]

@auvred is it possible to add a test please?

[auvred]

Sorry for delay, I added test

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Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	90.2 kB (-1 B)	34.4 kB (-3 B)	30.9 kB (-7 B)
vue.global.prod.js	147 kB (-1 B)	53.6 kB (-3 B)	47.8 kB (-26 B)

Usages

Name	Size	Gzip	Brotli
createApp	50.3 kB (-1 B)	19.7 kB (-1 B)	18 kB
createSSRApp	53.6 kB (-1 B)	21 kB (-1 B)	19.1 kB (-1 B)
defineCustomElement	52.6 kB (-1 B)	20.4 kB (-1 B)	18.6 kB (+14 B)
overall	64 kB (-1 B)	24.8 kB (-2 B)	22.5 kB (+1 B)