ci: forbids only in test files

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1c88d76) 79.17% compared to head (9fc3218) 78.41%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1601 +/- ## ========================================== - Coverage 79.17% 78.41% -0.77% ========================================== Files 93 93 Lines 4860 4860 Branches 934 934 ========================================== - Hits 3848 3811 -37 - Misses 710 751 +41 + Partials 302 298 -4 ```

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[github-actions[bot]]

:tada: This PR is included in version 17.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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