Missing limit on cache:key:files:

[atli-c]

Minimal .gitlab-ci.yml illustrating the issue

---
example_job:
  script:
    - echo "Heya"
  cache:
    key:
      files: [foo.txt, bar.txt, oh-no-too-many-files-for-cache-key.txt]

gitlab-ci-local works, but gitlab (EE 15.11) fails with:

Unable to create pipeline

• jobs:example_job:cache:key:files config has too many items (maximum is 2)

Expected behavior
gitlab-ci-local should fail the same way. I.e. max 2 cache key files.

Host information
macOS Ventura 13.4
gitlab-ci-local 4.40.0

Additional context
n/a

[hverlin]

Adding link to the docs
https://docs.gitlab.com/ee/ci/yaml/index.html#cachekeyfiles

[firecow]

This is a good first issue for anyone wanting to contribute 👍