fix: report file error as a <failure> on JUnit

[3c1u]

Description

Fixes #3423.

This pull request makes the JUnit reporter to report a file error as a <failure>, which was otherwise ignored. This would be helpful for testing possibly broken code (e.g. code with an syntax error) with Vitest + JUnit-compatible testing tools.

Before:

<?xml version="1.0" encoding="UTF-8" ?>
<testsuites name="vitest tests" tests="0" failures="0" errors="0" time="1.556">
    <testsuite name="with-syntax-error.test.js" timestamp="TIMESTAMP" hostname="HOSTNAME" tests="0" failures="0" errors="0" skipped="0" time="0">
    </testsuite>
</testsuites>

After:

<?xml version="1.0" encoding="UTF-8" ?>
<testsuites name="vitest tests" tests="1" failures="1" errors="0" time="2.529">
    <testsuite name="with-syntax-error.test.js" timestamp="TIMESTAMP" hostname="HOSTNAME" tests="1" failures="1" errors="0" skipped="0" time="0">
        <testcase classname="with-syntax-error.test.js" name="with-syntax-error.test.js" time="0">
            <failure message="Failed to parse source for import analysis because the content contains invalid JS syntax. If you are using JSX, make sure to name the file with the .jsx or .tsx extension." type="Error">
Error: Failed to parse source for import analysis because the content contains invalid JS syntax. If you are using JSX, make sure to name the file with the .jsx or .tsx extension.
 ❯ formatError ../../../node_modules/.pnpm/vite@4.3.9_@types+node@18.7.13/node_modules/vite/dist/node/chunks/dep-e8f070e8.js:42645:46
 ❯ TransformContext.error ../../../node_modules/.pnpm/vite@4.3.9_@types+node@18.7.13/node_modules/vite/dist/node/chunks/dep-e8f070e8.js:42641:19
 ❯ TransformContext.transform ../../../node_modules/.pnpm/vite@4.3.9_@types+node@18.7.13/node_modules/vite/dist/node/chunks/dep-e8f070e8.js:40447:22
 ❯ Object.transform ../../../node_modules/.pnpm/vite@4.3.9_@types+node@18.7.13/node_modules/vite/dist/node/chunks/dep-e8f070e8.js:42919:30
 ❯ loadAndTransform ../../../node_modules/.pnpm/vite@4.3.9_@types+node@18.7.13/node_modules/vite/dist/node/chunks/dep-e8f070e8.js:53385:29
            </failure>
        </testcase>
    </testsuite>
</testsuites>

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. If the feature is substantial or introduces breaking changes without a discussion, PR might be closed.
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Tests

• Run the tests with pnpm test:ci.

Documentation

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Changesets

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