[orc-rt] Add SPSSequence serialization from iterator_range. (#207715)

Adds an SPSSerializationTraits specialization that serializes an
iterator_range<IteratorT> as an SPSSequence<SPSElementTagT>, matching
the wire format of the existing container and span sequence serializers.
The element type is deduced via std::iterator_traits, so both class-type
iterators and raw pointers are supported.

This lets callers serialize an arbitrary [begin, end) sub-range
directly, without first copying the elements into a temporary container.
Only serialization is provided: a bare iterator pair has no meaningful
deserialization target, so decode into a std::vector (or other sequence
type) as usual.

Please enter the commit message for your changes. Lines starting
2 files changed
tree: a85dad130af956dbc53a9b795a6ddfeb2e961b38
  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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