[flang] Resolve binding names in type-bound generic

[flang] Resolve binding names in type-bound generic

Enhance `FindInTypeOrParents()` to also accept a `parser::Name` argument
and to resolve that name when the symbol is found. This causes binding
names in type-bound generic statements to be resolved. Move this process
to the beginning of the handling of such statements so that they are
resolve even if the generic spec is not and we return early.

Also resolve type parameter keywords in derived type specs
(e.g. `k` in `type(k=1) :: x`). That involves collecting and searching
the symbols of the `TypeParamDetails` to match the name with the symbol.

Original-commit: flang-compiler/f18@7387fb436d6d61bafe202f1d85a1e1ea824c7a32
Reviewed-on: https://github.com/flang-compiler/f18/pull/281
Tree-same-pre-rewrite: false