test: update test for inline sourcemap

[Dunqing]

Description

I noticed that the processing of #14370 is not related to the test.

According to the description of #14370's description, the inline-sourcemap should have been added in the transform, not hard code in the original file.

Also, this test blocked #14588

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the PR Title Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[sapphi-red]

Good catch! The sourcemap comment in the file will be stripped by

vite/packages/vite/src/node/server/transformRequest.ts

Lines 216 to 226 in 31333bb

	try {
	map = (
	convertSourceMap.fromSource(code) ||
	(await convertSourceMap.fromMapFileSource(
	code,
	createConvertSourceMapReadMap(file),
	))
	)?.toObject()
	code = code.replace(convertSourceMap.mapFileCommentRegex, blankReplacer)
	} catch (e) {

So it wasn't going through the test we wanted to.

[sapphi-red]

Thanks!