Alex Sweet authored Jun 29, 2021 and Brad King committed Jun 29, 2021

RPM 4.11.3 for el7 contains backported support for the RPM weak dep tags.
It only supports querying those tags, but rpmbuild can not make use of them.
Since CPack relies on rpmbuild --querytags to check for support, this
commit switches to rpm --suggests to check for support of weak
dependencies.

Fixes: #22350