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Issue Description

While trying out @typescript-eslint@rc-v8, with the projectService key and eslint-plugin-import, a number of unrelated files end up being included in the default project. This then leads to the "Too many files (>...) have matched the default project" error.

This has surfaced in the past, first in #8428, and then as a general issue in #8428.

The core issue is that the projectService key is not deleted in the relevant eslint-module-utils call-site., so files end up being parsed with the project service.

I'd be happy to contribute a PR, either for this specific key, or for the more general issue of exporting a utility to do the deletion.

I filed this as a separate issue, in case it helps tracking, but feel free to move it around 😇

Reproduction Repository Link

https://github.com/fpapado/typescript-eslint-v8-with-plugin-import

Repro Steps

1. clone the repo
2. pnpm install
3. pnpm eslint .

Versions