Provide updated clang-19 release

[mpusz]

It seems that APT releases are far behind the LLVM official release. The last available from the 19 stream is clang-19.1. This release had bugs that were fixed but never released. This means that, for example, my project mp-units can't be compiled on most Ubuntu machines using clang-19 and also does not compile on the Compiler Explorer.

[llvmbot]

@llvm/issue-subscribers-infrastructure

Author: Mateusz Pusz (mpusz)

It seems that [APT releases](https://releases.llvm.org/) are far behind the LLVM official release. The last available from the 19 stream is clang-19.1. This release had bugs that were fixed but never released. This means that, for example, my project [mp-units](https://mpusz.github.io/mp-units/latest/) can't be compiled on most Ubuntu machines using clang-19 and also does not compile on the Compiler Explorer.

[mpusz]

It seems that the packages were updated, but APT releases does not mention them.

[mpusz]

I thought there was no release as the #110231 problem is not fixed in clang-19. But it seems it was never merged there 😢

[sylvestre]

if you are talking about apt packages, it is here:
https://apt.llvm.org/