fix(plugin-vue): don't inline ts scripts during build

[jods4]

Partial revert of 93d9a2d
When building, TS scripts must not be inlined so that loaders (e.g. rollup-plugin-typescript2) are correctly applied.

Fixes #7908, #5795, #5044

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
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• Ideally, include relevant tests that fail without this PR but pass with it.

[sapphi-red]

I confirmed that this change does not impact performance when other loaders are not used at least for my project (containing 377 vue sfc components).

PS: I meant "performance" as "time to finish build".

[jods4]

@sapphi-red Note that the change proposed in this PR only impacts build.
During dev the TS code is still merged into SFC and processed by esbuild regardless.
This is the simplest fix to #7908 and is sufficient for the use cases that have reported so far.