clang: Upgrade to 19.x release

[kraj]

---

Contributor checklist

• [x] Changes have been tested
• [x] Signed-off-by is present
• [x] The PR complies with the Open Embedded Commit Patch Message Guidelines

Reviewer Guidelines

• When submitting a review, please pick:
  • 'Approve' if this change would be acceptable in the codebase (even if there are minor or cosmetic tweaks that could be improved).
  • 'Request Changes' if this change would not be acceptable in our codebase (e.g. bugs, changes that will make development harder in future, security/performance issues, etc).
  • 'Comment' if you don't feel you have enough information to decide either way (e.g. if you have major questions, or you don't understand the context of the change sufficiently to fully review yourself, but want to make a comment)

[shr-project]

FYI: I've noticed one more small issue introduced by this PR in some multilib builds:

ERROR: QA Issue: lib32-clang: Files/directories were installed but not shipped in any package:
  /usr/lib/libscanbuild
  /usr/lib/libscanbuild/intercept.py
  /usr/lib/libscanbuild/analyze.py
  /usr/lib/libscanbuild/clang.py
  /usr/lib/libscanbuild/report.py
  /usr/lib/libscanbuild/arguments.py
  /usr/lib/libscanbuild/shell.py
  /usr/lib/libscanbuild/compilation.py
  /usr/lib/libscanbuild/__init__.py
  /usr/lib/libscanbuild/resources
  /usr/lib/libscanbuild/resources/sorttable.js
  /usr/lib/libscanbuild/resources/selectable.js
  /usr/lib/libscanbuild/resources/scanview.css
Please set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install.
lib32-clang: 13 installed and not shipped files. [installed-vs-shipped]

In these builds we use a bit strange libdir /usr/lib32 (instead of usr/lib and usr/lib64), but other parts of clang respect that, only libscanbuild doesn't. Will investigate and send fix (I don't think it should block this PR, it's just FYI).

[shr-project]

installed-vs-shipped QA issue fixed in: https://github.com/shr-project/meta-clang/commit/ff430da341c0489543c9f806a0ff54a795b7c80f

if you want to pick it to this PR (or I can open separate PR on top of this)

[kraj]

installed-vs-shipped QA issue fixed in: shr-project@ff430da

if you want to pick it to this PR (or I can open separate PR on top of this)

yeah I have cherry-picked it into clang19 PR and also to my llvm fork.