Remove paths-ignore from required status checks

[k0kubun]

I'm going to add a few CI jobs to required status check of master branch.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/troubleshooting-required-status-checks#handling-skipped-but-required-checks
If a workflow is skipped due to path filtering, branch filtering or a commit message, then checks associated with that workflow will remain in a "Pending" state. A pull request that requires those checks to be successful will be blocked from merging.

For this reason you should not use path or branch filtering to skip workflow runs if the workflow is required.

This PR removes paths-ignore from those jobs since GitHub recommends to remove it from jobs used for required status checks.