[lldb][NFCI] Refactor AppleObjCClassDescriptorV2 method_t parsing functions (#163291)

This rewrites ClassDescriptorV2::method_t::Read (and the loop calling
that function) in an NFCI way to perform a couple of things:

1. Cleanup code with indirect style. For example, the old loop would
have default-constructor a `unique_ptr<method_t>`, which was *reused* on
every iteration of the loop. It called `method_t::Read` on each
iteration, and never checked the return value prior to invoking the
callback. In other words, if `Read` failed, the callback was called on
random values.

2. Exposed memory reads that could benefit from the MultiMemoryRead
packet proposed in [1].

[1]:
https://discourse.llvm.org/t/rfc-a-new-vectorized-memory-read-packet/88441
2 files changed
tree: 53d75f594427054e6b4077bbb724fa59d335c34d
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. SECURITY.md
README.md

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