Currently we set `FunctionRefKind::Compound` for
enum element patterns with tuple sub-patterns to
ensure the member has argument labels stripped. As
such, we need to account for the correct application
level in `getNumApplications`. We ought to be
setting the correct FunctionRefKind and properly
handling the label matching in the solver though.
We also ought to consider changing FunctionRefKind
such that "is compound" is a separate bit from the
application level.
rdar://139234188
