v0.25.5: Unable to load custom reporters by package name

[AriPerkkio]

Describe the bug

Custom reporters fail to load in 0.25.5 but work fine in 0.25.4.

~/projects/vitest-dev-vitest-hubyyo
❯ npm test
$ vitest run
Error: Failed to load custom Reporter from vitest-sonar-reporter
 ❯ loadCustomReporterModule file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:9214:11
 ❯ eval file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:9227:32
 ❯ Vitest.setServer file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:10595:201
 ❯ configureServer file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:11415:11
 ❯ Module.createServer file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vite/dist/node/chunks/dep-5605cfa4.js:62164:24
 ❯ createVitest file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:11447:18
 ❯ Module.startVitest file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-externalize.ca4784be.js:11563:15
 ❯ start file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/cli.js:712:17
 ❯ CAC.run file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/cli.js:691:3

Caused by: Error: [vite-node] Failed to load ./sonar-reporter.js
 ❯ ViteNodeRunner.directRequest file:/home/projects/vitest-dev-vitest-hubyyo/node_modules/vitest/dist/chunk-vite-node-source-map.d0aa773d.js:255:13

After #2245 there were some new reporter tests added. I think more is needed.

Reproduction

I'm reusing the repro from earlier bug. Only changed the version to the latest one: https://stackblitz.com/edit/vitest-dev-vitest-hubyyo?file=package.json

Change version to see tests pass

-     "vitest": "0.25.5",
+    "vitest": "0.25.4",

System Info

Stackblitz

Used Package Manager

pnpm

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