skip Moose testing except for smokers and authors

if Moose is installed but broken (e.g. Module::Runtime got updated and Moose
hasn't been updated to match), these tests will fail. Worse, they might
actually be trying to upgrade Moose *right now*, and got this dist as a
prerequisite (newly added in Moose 2.1211)!
shorter pod lists
also check for outdated Moose things when we are installing
Test-CleanNamespaces-0.16

  - skip Moose-related tests for normal installs, to get out of circularity
    hell if Moose is installed but broken and needing an upgrade