[CI]: Use ubuntu-slim for GitHub Actions

[SYaoJun]

Describe the enhancement requested

ubuntu-slim is a new cost-efficient runner to fit small jobs like license-check. We had better use this to save ASF infra usage (if possible)

https://github.blog/changelog/2025-10-28-1-vcpu-linux-runner-now-available-in-github-actions-in-public-preview/
https://github.com/actions/runner-images/blob/main/images/ubuntu-slim/ubuntu-slim-Readme.md

ref: apache/orc#2566

Component(s)

Developer Tools