Change DaggerSuperficialValidation to throw rather than return a bool…

…ean.

This CL changes DaggerSuperficialValidation to throw a ValidationException when resolution fails rather than returning a boolean.

This has a few benefits:

  1. It allows us to collect more information when validation fails by
     storing it in the exception.
  2. We already collect this information for "unexpected" exceptions during
     DaggerSuperficialValidation, so we can reuse that same exception for
     "expected" exceptions (i.e. those thrown by us).

Note that, currently, we don't do anything with the additional information contained in the ValidationException, but we'll eventually pass that information to XProcessing to give better error messages for the deferred elements.

RELNOTES=N/A
PiperOrigin-RevId: 416346969