[DynInst_API:] [dyninst/dyninst] e4e6fb: Refactor dwarf/dwarf_names.h (#1514)

[Tim Haines <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: e4e6fbc7fdfe7faaa9f0a6ceb42b5d9adc996bf5
      https://github.com/dyninst/dyninst/commit/e4e6fbc7fdfe7faaa9f0a6ceb42b5d9adc996bf5
  Author: Tim Haines <thaines.astro@xxxxxxxxx>
  Date:   2023-09-08 (Fri, 08 Sep 2023)

  Changed paths:
    M dwarf/h/dwarf_cu_info.h
    M symtabAPI/src/Object-elf.C
    M symtabAPI/src/dwarfWalker.C

  Log Message:
  -----------
  Refactor dwarf/dwarf_names.h (#1514)

* Rename is_fullcu -> is_full_unit

* Rename is_partialcu -> is_partial_unit

* Rename is_typecu -> is_type_unit

* Refactor is_cudie to make unit concepts clearer

* Add is_imported_unit for completeness

Not currently used.