tools: Conditionalize recommends of "cockpit" metapackage (#9042)
tools: Conditionalize recommends of "cockpit" metapackage (#9042)

Only let cockpit pull in c-{networkmanager,storaged,docker} if the
corresponding packages are installed. We don't want the metapackage to
pull in these system APIs, only provide a Cockpit UI if these are
already available.
moraleslazaro/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,andreasn/cockpit,mareklibra/cockpit,deryni/cockpit,SotolitoLabs/cockpit,deryni/cockpit,andreasn/cockpit,garrett/cockpit,mareklibra/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,mareklibra/cockpit,andreasn/cockpit,mvollmer/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,stefwalter/cockpit,martinpitt/cockpit,cockpituous/cockpit,deryni/cockpit,deryni/cockpit,garrett/cockpit,stefwalter/cockpit,martinpitt/cockpit,mareklibra/cockpit,deryni/cockpit,andreasn/cockpit,mvollmer/cockpit,cockpituous/cockpit,cockpituous/cockpit,stefwalter/cockpit,garrett/cockpit,moraleslazaro/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,SotolitoLabs/cockpit,deryni/cockpit,garrett/cockpit,andreasn/cockpit,andreasn/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,mvollmer/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpit-project/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,garrett/cockpit,mareklibra/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,stefwalter/cockpit,moraleslazaro/cockpit