Otherwise, if we move in a formal access cleanup value into switch emission
using a cleanup cloner, we will improperly have a formal access cleanup that
will be invalidated by a normal Scope which violates SILGen invariants. Also in
a certain sense the bindings performed by SILGenPattern that do this type of
forwarding are arguments in a certain sense so it seems reasonable to do this.
<rdar://problem/70736924>
