[lldb] Refactor LLDB Breakpoint Event Notifications to centralize and eliminate code duplication (#164739)

### Summary

This PR refactors breakpoint event notification in LLDB to centralize
and eliminate code duplication. It creates a unified method in the
`Target` class for sending breakpoint change events. The new methods
check if listeners exist before broadcasting events

### Test

<img width="1532" height="76" alt="Screenshot 2025-10-23 at 12 49 31 PM"
src="https://github.com/user-attachments/assets/6d6a6da6-9684-463c-aeeb-90663cdbd077"
/>

---------

Co-authored-by: Piyush Jaiswal <piyushjais@meta.com>
5 files changed
tree: b64adc969be1df27012c25d9fbc8531140a75000
  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
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