Most methods that accept a `ClassDesc` also have an overload that accept
`Class`. These two methods did not, until now.

This is because certain versions of GraalVM native image cannot handle
our custom translation strategy.

This commit is temporary and is expected to be reverted in the future.

The `switch` expressions always have to have a `default` case, but
the `switch` statements do not. If they actually don't have it,
we used to bind a single `Label` object twice, which caused
an exception. This commit fixes that.