fix: properly clean up optimization temp folder

[patak-dev]

Description

Use the new esbuild context.cancel() method to stop optimization runs. This is a continuation of:

• feat: cancellable scan during optimization #12225

Before this PR, there may be a path where the deps_temp folder wasn't properly cleaned up.

After #12225 and this PR are merged, I'll explore using unique names for the temp folders.

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

[stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

suite	result
astro	✅ success
histoire	❌ failure
iles	✅ success
ladle	✅ success
laravel	✅ success
marko	✅ success
nuxt-framework	✅ success
previewjs	✅ success
qwik	✅ success
rakkas	✅ success
sveltekit	✅ success
vite-plugin-ssr	✅ success
vite-plugin-react	✅ success
vite-plugin-react-pages	❌ failure
vite-plugin-react-swc	✅ success
vite-plugin-svelte	✅ success
vite-plugin-vue	❌ failure
vite-setup-catalogue	✅ success
vitepress	✅ success
vitest	✅ success
windicss	✅ success

[patak-dev]

I'm seeing flakiness on this PR, but I think it is across the board. I have seen several fails on main these past two days. @bluwy @sapphi-red maybe you could check this one out just in case too.