Fixes using upper namespaced function indirectly

[markwpearce]

Fixes:

namespace alpha
    sub foo()
    end sub

    namespace beta
        sub bar()
            foo()  ' this SHOULD be a an error -- no function foo() at file scope.
        end sub
    end namespace
end namespace

From this slack conversation: https://rokudevelopers.slack.com/archives/CKF1QQGTY/p1728307032364379