refactor(scheduler): remove invalidateJob

[skirtles-code]

Closes #7745.

I have an old PR, #7745, that fixes a minor bug in invalidateJob. However, since Vue 3.4, the external symptoms of the bug disappeared. The problem in the code is still present, but it can no longer be reproduced via the public API.

Longer explanation at #7745 (comment).

In short, I believe we no longer need to use invalidateJob to remove child jobs from the queue. We can just leave the job in the queue. Since 3.4, update jobs check their dirty flag before doing anything else, so running an unnecessary job is very cheap.

Removing the job involves calls to indexOf and splice, neither of which are cheap operations. Using a flag instead is similar to the approach used by invalidateMount (see #9370 (comment)).

The test for invalidateJob had to be removed too. I've added a couple of new tests to try to cover some of the relevant edge cases, but testing via the public API.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	98.6 kB (-64 B)	37.3 kB (-25 B)	33.6 kB (+13 B)
vue.global.prod.js	156 kB (-64 B)	57.1 kB (-25 B)	50.8 kB (-86 B)

Usages

Name	Size	Gzip	Brotli
createApp	54 kB (-64 B)	20.9 kB (-23 B)	19.1 kB (-20 B)
createSSRApp	57.9 kB (-64 B)	22.5 kB (-26 B)	20.5 kB (-18 B)
defineCustomElement	58.6 kB (-64 B)	22.4 kB (-24 B)	20.4 kB (-76 B)
overall	67.6 kB (-64 B)	26 kB (-24 B)	23.6 kB (-19 B)

[pkg-pr-new]

commit: 2ec8d00

@vue/compiler-core

pnpm add https://pkg.pr.new/@vue/compiler-core@11650

@vue/compiler-dom

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@vue/compiler-sfc

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@vue/compiler-ssr

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@vue/reactivity

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@vue/runtime-core

pnpm add https://pkg.pr.new/@vue/runtime-core@11650

@vue/runtime-dom

pnpm add https://pkg.pr.new/@vue/runtime-dom@11650

@vue/server-renderer

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@vue/shared

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vue

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@vue/compat

pnpm add https://pkg.pr.new/@vue/compat@11650

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