fix: deprecate { assert: { type: raw }} in favor of { as: raw } (fix #7017)

[brillout]

Description

Implements the following comment in #7017.

We talked about this PR and we think we should add { as: 'raw' } for glob import marked as experimental in Vite 2.9 and deprecate the { assert: { type: 'raw' }} syntax. We can then remove the assert syntax in Vite 3.0 at the beginning of May.

Additional context

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[patak-dev]

Thanks for taking care of this @brillout!

[bluwy]

We may want to update the docs too: https://vitejs.dev/guide/features.html#glob-import

[brillout]

We may want to update the docs too: https://vitejs.dev/guide/features.html#glob-import

👍 Done