[opensuse-packaging] Lifting restriction of Boolean Deps in Tumbleweed

Dear Packagers and Devs, As we recently switched the rpm payload compression format to zstd, we had to give up 'zypper dup' compatibility from Leap < 15.2 to Tumbleweed. As we gave up on this compatibility, it is now time to also lift the limitation of using boolean dependencies. So far we only accepted boolean deps on Recommends: and Supplements: tags, but not on Requires:, as zypper dup could end up not being able to upgrade. Feel free to use those tags if they help you. Cheers, Dominique Boolean Deps Documentation: https://rpm.org/user_doc/boolean_dependencies.html