Revert "CP-52245: Temp disable repo_gpgcheck when syncing from remote_pool repo"

[gangj]

This reverts commit c710e8f.

[psafont]

I'm missing the context for the revert, could you explain the reason in the commit? thanks

[gangj]

I'm missing the context for the revert, could you explain the reason in the commit? thanks

Sure, c710e8f temporarily disabled repo_gpgcheck for remote_pool type of repository, it is because we(uses yum util: reposync) have not synced "asc" type of file from CDN or update bundle to the local cached yum repo in the coordinator, when later the coordinator become a remote_pool repo, it is that "asc" file: repo_gpgcheck was checked upon when syncing updating from the remote_pool repo.
As now we have patched "yum util" to make "reposync" also have "asc" file synced, we can re-enable repo_gpgcheck for remote_pool repo.