[flang] Resolve calls to type-bound generic names

Extend `ResolveGeneric` to handle calls to procedure components by
passing in the data-ref that is used as the passed-object argument.

`AddPassArg` takes care of adding a placeholder for the passed object.
This is shared by the generic and non-generic cases of calls to
procedure components.

Original-commit: flang-compiler/f18@be83590183f7abf32c0cc111c812fd484af36f2b
Reviewed-on: https://github.com/flang-compiler/f18/pull/863